message: Remove unused `LeftPanel` dimension tracking
diff: @@ -64,7 +64,6 @@ interface IState {
  @replaceableComponent("structures.LeftPanel")
  export default class LeftPanel extends React.Component<IProps, IState> {
  - private ref = createRef<HTMLDivElement>();
  private listContainerRef = createRef<HTMLDivElement>();
  private roomSearchRef = createRef<RoomSearch>();
  private roomListRef = createRef<RoomList>();
  @@ -90,7 +89,6 @@ export default class LeftPanel extends React.Component<IProps, IState> {
  }
  public componentDidMount() {
  - UIStore.instance.trackElementDimensions("LeftPanel", this.ref.current);
  UIStore.instance.trackElementDimensions("ListContainer", this.listContainerRef.current);
  UIStore.instance.on("ListContainer", this.refreshStickyHeaders);
  // Using the passive option to not block the main thread
  @@ -420,7 +418,7 @@ export default class LeftPanel extends React.Component<IProps, IState> {
  );
  return (
  - <div className={containerClasses} ref={this.ref}>
  + <div className={containerClasses}>
  <aside className="mx_LeftPanel_roomListContainer">
  { this.renderSearchDialExplore() }
  { this.renderBreadcrumbs() }
  