Remove tiles outside of texture to elliminate these errors on loading:

[chrisl8]

ERROR: Cannot create tile. The tile is outside the texture or tiles are already present in the space the tile would cover.
   at: (scene\resources\2d\tile_set.cpp:4963)
ERROR: The TileSetAtlasSource atlas has no tile at (1, 0).
   at: (scene\resources\2d\tile_set.cpp:5400)
ERROR: TileSetAtlasSource has no tile at (1, 0).
   at: (scene\resources\2d\tile_set.cpp:5348)

This is for the 2D Dynamic Tilemap Layers Demo