code: function( roomID, key ) {
  
  		var oldVal;
  
  		if( roomData[ roomID ] === undefined ) {
  
  			return promise.reject( 'There is no room by that id' );
  		} else {
  
  			oldVal = roomData[ roomID ][ key ];
  
  			delete roomData[ roomID ][ key ];
  
  			return promise.resolve( oldVal );
  		}
  	}
docs: delete a variable from the rooms data object
  
  @param {String} roomID id for the room
  @param {String} key variable name/key that you want to delete
  @return {Promise} once this promise succeeds it will return the value that was stored before delete