MM-49862 - remove no longer needed webapp calls to action and pulsating dots (#22699)

* MM-49862 - remove no longer needed webapp calls to action and pulsating dots

* fix snapshots

* improve function logic based on pr comments

* fix unit tests

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Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/channels/src/components/threading/virtualized_thread_viewer/thread_viewer_row.tsx

@@ -27,7 +27,6 @@ type Props = {
     previousPostId: string;
     teamId: string;
     timestampProps?: Partial<TimestampProps>;
-    lastPost: Post;
 };
 
 function noop() {}

webapp/channels/src/components/threading/virtualized_thread_viewer/virtualized_thread_viewer.tsx

@@ -403,7 +403,6 @@ class ThreadViewerVirtualized extends PureComponent<Props, State> {
                     previousPostId={getPreviousPostId(data, index)}
                     teamId={this.props.teamId}
                     timestampProps={this.props.useRelativeTimestamp ? THREADING_TIME : undefined}
-                    lastPost={this.props.lastPost}
                 />
             </div>
         );