Remove mask from create_grid() output (#786)

- This variable was added for convenience to get the grid shape, but serves no other purpoes

Author: tomvothecoder

tests/test_regrid.py

@@ -1165,9 +1165,6 @@ def test_create_grid_with_coords(self):
 
         assert np.array_equal(new_grid.lat, self.lat)
         assert np.array_equal(new_grid.lon, self.lon)
-        assert np.array_equal(
-            new_grid.mask, xr.DataArray(np.ones((5, 3)), dims=("lat", "lon"))
-        )
 
     def test_create_grid_with_tuple_of_coords_and_no_bounds(self):
         # This case happens if `create_axis` is used without creating bounds,

xcdat/regridder/grid.py

@@ -530,8 +530,6 @@ def create_grid(
 
         ds = ds.assign_coords({coords.name: coords})
 
-    ds["mask"] = create_mask(ds)
-
     return ds