diff --git a/lib/shared/messages/sidebar-source-message-spec.js b/lib/shared/messages/sidebar-source-message-spec.js
--- a/lib/shared/messages/sidebar-source-message-spec.js
+++ b/lib/shared/messages/sidebar-source-message-spec.js
@@ -6,13 +6,11 @@
   pushTypes,
   type CreateMessageInfoParams,
   type MessageSpec,
-  type NotificationTextsParams,
   type RawMessageInfoFromServerDBRowParams,
 } from './message-spec.js';
-import { assertSingleMessageInfo, joinResult } from './utils.js';
+import { joinResult } from './utils.js';
 import type { PlatformDetails } from '../../types/device-types.js';
 import type {
-  MessageInfo,
   RawSidebarSourceMessageInfo,
   SidebarSourceMessageData,
   SidebarSourceMessageInfo,
@@ -21,7 +19,6 @@
 import { messageTypes } from '../../types/message-types.js';
 import type { RawUnsupportedMessageInfo } from '../../types/messages/unsupported.js';
 import type { NotifTexts } from '../../types/notif-types.js';
-import type { ThreadInfo } from '../../types/thread-types.js';
 import type { RelativeUserInfo } from '../../types/user-types.js';
 import { hasMinCodeVersion } from '../version-utils.js';
 
@@ -137,7 +134,6 @@
     rawMessageInfo: RawSidebarSourceMessageInfo,
     platformDetails: ?PlatformDetails,
   ): RawSidebarSourceMessageInfo | RawUnsupportedMessageInfo {
-    // TODO determine min code version
     if (
       hasMinCodeVersion(platformDetails, 75) &&
       rawMessageInfo.sourceMessage
@@ -164,18 +160,11 @@
     return unwrapped;
   },
 
-  async notificationTexts(
-    messageInfos: $ReadOnlyArray<MessageInfo>,
-    threadInfo: ThreadInfo,
-    params: NotificationTextsParams,
-  ): Promise<NotifTexts> {
-    const messageInfo = assertSingleMessageInfo(messageInfos);
+  notificationTexts(): Promise<NotifTexts> {
     invariant(
-      messageInfo.type === messageTypes.SIDEBAR_SOURCE,
-      'messageInfo should be messageTypes.SIDEBAR_SOURCE!',
+      false,
+      'SIDEBAR_SOURCE notificationTexts should never be called directly!',
     );
-    const sourceMessageInfo = messageInfo.sourceMessage;
-    return await params.notificationTexts([sourceMessageInfo], threadInfo);
   },
 
   notificationCollapseKey(rawMessageInfo: RawSidebarSourceMessageInfo): string {