diff --git a/native/chat/chat-input-bar.react.js b/native/chat/chat-input-bar.react.js
--- a/native/chat/chat-input-bar.react.js
+++ b/native/chat/chat-input-bar.react.js
@@ -82,7 +82,6 @@
 import type {
   ChatMentionCandidates,
   ClientThreadJoinRequest,
-  LegacyRelativeMemberInfo,
   ThreadJoinPayload,
 } from 'lib/types/thread-types.js';
 import { type UserInfos } from 'lib/types/user-types.js';
@@ -297,9 +296,7 @@
   +dispatchActionPromise: DispatchActionPromise,
   +joinThread: (request: ClientThreadJoinRequest) => Promise<ThreadJoinPayload>,
   +inputState: ?InputState,
-  +userMentionsCandidates: $ReadOnlyArray<
-    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
-  >,
+  +userMentionsCandidates: $ReadOnlyArray<MinimallyEncodedRelativeMemberInfo>,
   +chatMentionSearchIndex: SentencePrefixSearchIndex,
   +chatMentionCandidates: ChatMentionCandidates,
   +parentThreadInfo: ?ThreadInfo,
diff --git a/native/chat/settings/thread-settings-member-tooltip-modal.react.js b/native/chat/settings/thread-settings-member-tooltip-modal.react.js
--- a/native/chat/settings/thread-settings-member-tooltip-modal.react.js
+++ b/native/chat/settings/thread-settings-member-tooltip-modal.react.js
@@ -9,7 +9,6 @@
   MinimallyEncodedRelativeMemberInfo,
   ThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
-import type { LegacyRelativeMemberInfo } from 'lib/types/thread-types.js';
 import { useDispatchActionPromise } from 'lib/utils/redux-promise-utils.js';
 
 import ThreadSettingsMemberTooltipButton from './thread-settings-member-tooltip-button.react.js';
@@ -25,7 +24,7 @@
 import Alert from '../../utils/alert.js';
 
 export type ThreadSettingsMemberTooltipModalParams = TooltipParams<{
-  +memberInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  +memberInfo: MinimallyEncodedRelativeMemberInfo,
   +threadInfo: ThreadInfo,
 }>;
 
diff --git a/native/chat/settings/thread-settings-member.react.js b/native/chat/settings/thread-settings-member.react.js
--- a/native/chat/settings/thread-settings-member.react.js
+++ b/native/chat/settings/thread-settings-member.react.js
@@ -23,7 +23,6 @@
   MinimallyEncodedRelativeMemberInfo,
   ThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
-import type { LegacyRelativeMemberInfo } from 'lib/types/thread-types.js';
 import { useRolesFromCommunityThreadInfo } from 'lib/utils/role-utils.js';
 
 import type { ThreadSettingsNavigate } from './thread-settings.react.js';
@@ -90,7 +89,7 @@
 };
 
 type BaseProps = {
-  +memberInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  +memberInfo: MinimallyEncodedRelativeMemberInfo,
   +threadInfo: ThreadInfo,
   +canEdit: boolean,
   +navigate: ThreadSettingsNavigate,
diff --git a/native/chat/settings/thread-settings.react.js b/native/chat/settings/thread-settings.react.js
--- a/native/chat/settings/thread-settings.react.js
+++ b/native/chat/settings/thread-settings.react.js
@@ -41,7 +41,6 @@
 import type { RelationshipButton } from 'lib/types/relationship-types.js';
 import { threadPermissions } from 'lib/types/thread-permission-types.js';
 import { threadTypes } from 'lib/types/thread-types-enum.js';
-import type { LegacyRelativeMemberInfo } from 'lib/types/thread-types.js';
 import type { UserInfos } from 'lib/types/user-types.js';
 import {
   useResolvedOptionalThreadInfo,
@@ -204,9 +203,7 @@
   | {
       +itemType: 'member',
       +key: string,
-      +memberInfo:
-        | LegacyRelativeMemberInfo
-        | MinimallyEncodedRelativeMemberInfo,
+      +memberInfo: MinimallyEncodedRelativeMemberInfo,
       +threadInfo: ResolvedThreadInfo,
       +canEdit: boolean,
       +navigate: ThreadSettingsNavigate,
@@ -1126,9 +1123,7 @@
 
 const threadMembersChangeIsSaving = (
   state: AppState,
-  threadMembers: $ReadOnlyArray<
-    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
-  >,
+  threadMembers: $ReadOnlyArray<MinimallyEncodedRelativeMemberInfo>,
 ) => {
   for (const threadMember of threadMembers) {
     const removeUserLoadingStatus = createLoadingStatusSelector(
diff --git a/native/roles/change-roles-screen.react.js b/native/roles/change-roles-screen.react.js
--- a/native/roles/change-roles-screen.react.js
+++ b/native/roles/change-roles-screen.react.js
@@ -16,7 +16,6 @@
   MinimallyEncodedRelativeMemberInfo,
   ThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
-import type { LegacyRelativeMemberInfo } from 'lib/types/thread-types.js';
 import { values } from 'lib/utils/objects.js';
 
 import ChangeRolesHeaderRightButton from './change-roles-header-right-button.react.js';
@@ -29,7 +28,7 @@
 
 export type ChangeRolesScreenParams = {
   +threadInfo: ThreadInfo,
-  +memberInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  +memberInfo: MinimallyEncodedRelativeMemberInfo,
   +role: ?string,
 };
 
diff --git a/web/input/input-state.js b/web/input/input-state.js
--- a/web/input/input-state.js
+++ b/web/input/input-state.js
@@ -13,10 +13,7 @@
   MinimallyEncodedRelativeMemberInfo,
   ThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
-import type {
-  ChatMentionCandidates,
-  LegacyRelativeMemberInfo,
-} from 'lib/types/thread-types.js';
+import type { ChatMentionCandidates } from 'lib/types/thread-types.js';
 
 export type PendingMultimediaUpload = {
   +localID: string,
@@ -50,9 +47,7 @@
 export type TypeaheadState = {
   +canBeVisible: boolean,
   +keepUpdatingThreadMembers: boolean,
-  +frozenUserMentionsCandidates: $ReadOnlyArray<
-    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
-  >,
+  +frozenUserMentionsCandidates: $ReadOnlyArray<MinimallyEncodedRelativeMemberInfo>,
   +frozenChatMentionsCandidates: ChatMentionCandidates,
   +moveChoiceUp: ?() => void,
   +moveChoiceDown: ?() => void,
diff --git a/web/modals/threads/create/steps/subchannel-members-list.react.js b/web/modals/threads/create/steps/subchannel-members-list.react.js
--- a/web/modals/threads/create/steps/subchannel-members-list.react.js
+++ b/web/modals/threads/create/steps/subchannel-members-list.react.js
@@ -8,7 +8,6 @@
   MinimallyEncodedRelativeMemberInfo,
   ThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
-import type { LegacyRelativeMemberInfo } from 'lib/types/thread-types.js';
 import type { UserListItem } from 'lib/types/user-types.js';
 
 import { useSelector } from '../../../../redux/redux-utils.js';
@@ -43,11 +42,7 @@
   );
 
   const filterOutParentMembersWithENSNames = React.useCallback(
-    (
-      members: $ReadOnlyArray<
-        LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
-      >,
-    ) =>
+    (members: $ReadOnlyArray<MinimallyEncodedRelativeMemberInfo>) =>
       members
         .filter(
           user =>
@@ -68,11 +63,7 @@
   );
 
   const filterOutOtherMembersWithENSNames = React.useCallback(
-    (
-      members: $ReadOnlyArray<
-        LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
-      >,
-    ) =>
+    (members: $ReadOnlyArray<MinimallyEncodedRelativeMemberInfo>) =>
       members
         .filter(
           user =>
diff --git a/web/modals/threads/members/change-member-role-modal.react.js b/web/modals/threads/members/change-member-role-modal.react.js
--- a/web/modals/threads/members/change-member-role-modal.react.js
+++ b/web/modals/threads/members/change-member-role-modal.react.js
@@ -15,7 +15,6 @@
   MinimallyEncodedRelativeMemberInfo,
   ThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
-import type { LegacyRelativeMemberInfo } from 'lib/types/thread-types';
 import { values } from 'lib/utils/objects.js';
 import { useDispatchActionPromise } from 'lib/utils/redux-promise-utils.js';
 
@@ -28,7 +27,7 @@
 import UnsavedChangesModal from '../../unsaved-changes-modal.react.js';
 
 type ChangeMemberRoleModalProps = {
-  +memberInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  +memberInfo: MinimallyEncodedRelativeMemberInfo,
   +threadInfo: ThreadInfo,
 };
 
diff --git a/web/modals/threads/members/member.react.js b/web/modals/threads/members/member.react.js
--- a/web/modals/threads/members/member.react.js
+++ b/web/modals/threads/members/member.react.js
@@ -15,7 +15,6 @@
   MinimallyEncodedRelativeMemberInfo,
   ThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
-import type { LegacyRelativeMemberInfo } from 'lib/types/thread-types.js';
 import { useDispatchActionPromise } from 'lib/utils/redux-promise-utils.js';
 import { useRolesFromCommunityThreadInfo } from 'lib/utils/role-utils.js';
 
@@ -31,7 +30,7 @@
 const commIconComponent = <CommIcon size={18} icon="user-edit" />;
 
 type Props = {
-  +memberInfo: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  +memberInfo: MinimallyEncodedRelativeMemberInfo,
   +threadInfo: ThreadInfo,
   +setOpenMenu: SetState<?string>,
 };
diff --git a/web/modals/threads/members/members-list.react.js b/web/modals/threads/members/members-list.react.js
--- a/web/modals/threads/members/members-list.react.js
+++ b/web/modals/threads/members/members-list.react.js
@@ -11,16 +11,13 @@
   MinimallyEncodedRelativeMemberInfo,
   ThreadInfo,
 } from 'lib/types/minimally-encoded-thread-permissions-types.js';
-import type { LegacyRelativeMemberInfo } from 'lib/types/thread-types.js';
 
 import ThreadMember from './member.react.js';
 import css from './members-modal.css';
 
 type Props = {
   +threadInfo: ThreadInfo,
-  +threadMembers: $ReadOnlyArray<
-    LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
-  >,
+  +threadMembers: $ReadOnlyArray<MinimallyEncodedRelativeMemberInfo>,
 };
 
 function ThreadMembersList(props: Props): React.Node {
@@ -45,20 +42,14 @@
         .map(([letter, users]) => {
           const userList = users
             .sort((a, b) => stringForUser(a).localeCompare(stringForUser(b)))
-            .map(
-              (
-                user:
-                  | LegacyRelativeMemberInfo
-                  | MinimallyEncodedRelativeMemberInfo,
-              ) => (
-                <ThreadMember
-                  key={user.id}
-                  memberInfo={user}
-                  threadInfo={threadInfo}
-                  setOpenMenu={setOpenMenu}
-                />
-              ),
-            );
+            .map((user: MinimallyEncodedRelativeMemberInfo) => (
+              <ThreadMember
+                key={user.id}
+                memberInfo={user}
+                threadInfo={threadInfo}
+                setOpenMenu={setOpenMenu}
+              />
+            ));
           const letterHeader = (
             <h5 className={css.memberletterHeader} key={letter}>
               {letter.toUpperCase()}
diff --git a/web/modals/threads/members/members-modal.react.js b/web/modals/threads/members/members-modal.react.js
--- a/web/modals/threads/members/members-modal.react.js
+++ b/web/modals/threads/members/members-modal.react.js
@@ -11,7 +11,6 @@
 } from 'lib/shared/thread-utils.js';
 import type { MinimallyEncodedRelativeMemberInfo } from 'lib/types/minimally-encoded-thread-permissions-types.js';
 import { threadPermissions } from 'lib/types/thread-permission-types.js';
-import type { LegacyRelativeMemberInfo } from 'lib/types/thread-types.js';
 import { useRolesFromCommunityThreadInfo } from 'lib/utils/role-utils.js';
 
 import { AddMembersModal } from './add-members-modal.react.js';
@@ -56,9 +55,8 @@
   const allMembers = React.useMemo(
     () =>
       threadMembersNotFiltered.filter(
-        (
-          member: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
-        ) => searchText.length === 0 || userIDs.includes(member.id),
+        (member: MinimallyEncodedRelativeMemberInfo) =>
+          searchText.length === 0 || userIDs.includes(member.id),
       ),
     [searchText.length, threadMembersNotFiltered, userIDs],
   );
@@ -66,10 +64,8 @@
   const roles = useRolesFromCommunityThreadInfo(threadInfo, allMembers);
   const adminMembers = React.useMemo(
     () =>
-      allMembers.filter(
-        (
-          member: LegacyRelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
-        ) => roleIsAdminRole(roles.get(member.id)),
+      allMembers.filter((member: MinimallyEncodedRelativeMemberInfo) =>
+        roleIsAdminRole(roles.get(member.id)),
       ),
     [allMembers, roles],
   );