message: Remove documentation for deleted parameter overwrite
diff: @@ -60,7 +60,6 @@ Tile::~Tile()
  * Adds a new Thing to the tile.
  *
  * \param thing Pointer to a Thing.
  - * \param overwrite Overwrite any existing Things that may already be in the Tile.
  */
  void Tile::pushThing(Thing* thing)
  {
  