message: remove dead code (collapse button was removed)
diff: @@ -146,10 +146,6 @@ module.exports = React.createClass({
  MatrixClientPeg.get().sendStateEvent(this.props.room.roomId, 'm.room.avatar', {url: null}, '');
  },
  - onShowRhsClick: function(ev) {
  - dis.dispatch({ action: 'show_right_panel' });
  - },
  -
  onShareRoomClick: function(ev) {
  const ShareDialog = sdk.getComponent("dialogs.ShareDialog");
  Modal.createTrackedDialog('share room dialog', '', ShareDialog, {
  