message: Stop setting `auto_join` on space child events
  It's not a specified property and not even used.
diff: @@ -316,11 +316,10 @@ export class SpaceStoreClass extends AsyncStoreWithClient<IState> {
  return [];
  };
  - public addRoomToSpace(space: Room, roomId: string, via: string[], suggested = false, autoJoin = false) {
  + public addRoomToSpace(space: Room, roomId: string, via: string[], suggested = false) {
  return this.matrixClient.sendStateEvent(space.roomId, EventType.SpaceChild, {
  via,
  suggested,
  - auto_join: autoJoin,
  }, roomId);
  }
  