message: Remove now unused TileMap::boundingBox() method
diff: @@ -65,7 +65,6 @@ public:
  Tile* getVisibleTile() { return getVisibleTile(mouseTilePosition()); }
  int edgeLength() const { return mEdgeLength; }
  - const NAS2D::Rectangle<int>& boundingBox() const { return mMapBoundingBox; }
  void injectMouse(NAS2D::Point<int> position) { mMousePixelPosition = position; }
  