diff --git a/lib/shared/thread-utils.js b/lib/shared/thread-utils.js
--- a/lib/shared/thread-utils.js
+++ b/lib/shared/thread-utils.js
@@ -985,26 +985,6 @@
   );
 }
 
-function threadIsWithBlockedUserOnly(
-  threadInfo: LegacyRawThreadInfo | RawThreadInfo,
-  viewerID: ?string,
-  userInfos: UserInfos,
-  checkOnlyViewerBlock: boolean,
-): boolean {
-  if (
-    threadOrParentThreadIsGroupChat(threadInfo) ||
-    threadOrParentThreadHasAdminRole(threadInfo)
-  ) {
-    return false;
-  }
-  return baseThreadIsWithBlockedUserOnly(
-    threadInfo,
-    viewerID,
-    userInfos,
-    checkOnlyViewerBlock,
-  );
-}
-
 function threadIsWithBlockedUserOnlyWithoutAdminRoleCheck(
   threadInfo: ThreadInfo | RawThreadInfo | LegacyRawThreadInfo,
   viewerID: ?string,
@@ -1022,14 +1002,6 @@
   );
 }
 
-function threadFrozenDueToBlock(
-  threadInfo: LegacyRawThreadInfo | RawThreadInfo,
-  viewerID: ?string,
-  userInfos: UserInfos,
-): boolean {
-  return threadIsWithBlockedUserOnly(threadInfo, viewerID, userInfos, false);
-}
-
 function useThreadFrozenDueToViewerBlock(
   threadInfo: ThreadInfo,
   communityThreadInfo: ?ThreadInfo,
@@ -1070,19 +1042,6 @@
     'Only visible to its members and admins of ancestor channels.',
 };
 
-// Since we don't have access to all of the ancestor ThreadInfos, we approximate
-// "parent admin" as anybody with CHANGE_ROLE permissions.
-function memberHasAdminPowers(
-  memberInfo:
-    | { +minimallyEncoded: true, +permissions: string, ... }
-    | { +minimallyEncoded?: void, +permissions: ThreadPermissionsInfo, ... },
-): boolean {
-  if (memberInfo.minimallyEncoded) {
-    return hasPermission(memberInfo.permissions, threadPermissions.CHANGE_ROLE);
-  }
-  return !!memberInfo.permissions[threadPermissions.CHANGE_ROLE]?.value;
-}
-
 function roleIsDefaultRole(
   roleInfo: ?ClientLegacyRoleInfo | ?RoleInfo,
 ): boolean {
@@ -1125,16 +1084,6 @@
   return !!_find({ name: 'Admins' })(threadInfo.roles);
 }
 
-function threadOrParentThreadHasAdminRole(
-  threadInfo: LegacyRawThreadInfo | RawThreadInfo,
-) {
-  return (
-    threadMembersWithoutAddedAdmin(threadInfo).filter(member =>
-      memberHasAdminPowers(member),
-    ).length > 0
-  );
-}
-
 function identifyInvalidatedThreads(
   updateInfos: $ReadOnlyArray<ClientUpdateInfo>,
 ): Set<string> {
@@ -1747,14 +1696,12 @@
   extractNewMentionedParentMembers,
   pendingThreadType,
   filterOutDisabledPermissions,
-  threadFrozenDueToBlock,
   useThreadFrozenDueToViewerBlock,
   rawThreadInfoFromServerThreadInfo,
   threadUIName,
   threadInfoFromRawThreadInfo,
   threadTypeDescriptions,
   threadIsWithBlockedUserOnlyWithoutAdminRoleCheck,
-  memberHasAdminPowers,
   roleIsDefaultRole,
   roleIsAdminRole,
   threadHasAdminRole,