message: Remove now unused function tileMouseHover()
diff: @@ -57,7 +57,6 @@ public:
  void centerMapOnTile(Tile*);
  bool tileHighlightVisible() const;
  - NAS2D::Point<int> tileMouseHover() const { return mMouseTilePosition.xy; }
  MapCoordinate mouseTilePosition() const { return mMouseTilePosition; }
  const Point2dList& mineLocations() const { return mMineLocations; }
  