Apply ruff/flake8-pyi rule PYI051

PYI051 `Literal["..."]` is redundant in a union with `str`

Author: DimitriPapadopoulos

xarray/backends/api.py

@@ -71,7 +71,7 @@
     T_NetcdfEngine = Literal["netcdf4", "scipy", "h5netcdf"]
     T_Engine = Union[
         T_NetcdfEngine,
-        Literal["pydap", "zarr"],
+        Literal["pydap", "zarr"],  # noqa: PYI051
         type[BackendEntrypoint],
         str,  # no nice typing support for custom backends
         None,

xarray/core/types.py

@@ -214,7 +214,7 @@ def copy(
 
 # FYI in some cases we don't allow `None`, which this doesn't take account of.
 # FYI the `str` is for a size string, e.g. "16MB", supported by dask.
-T_ChunkDim: TypeAlias = str | int | Literal["auto"] | None | tuple[int, ...]
+T_ChunkDim: TypeAlias = int | Literal["auto"] | None | tuple[int, ...]
 T_ChunkDimFreq: TypeAlias = Union["TimeResampler", T_ChunkDim]
 T_ChunksFreq: TypeAlias = T_ChunkDim | Mapping[Any, T_ChunkDimFreq]
 # We allow the tuple form of this (though arguably we could transition to named dims only)

xarray/namedarray/_typing.py

@@ -78,7 +78,7 @@ def dtype(self) -> _DType_co: ...
 _NormalizedChunks = tuple[tuple[int, ...], ...]
 # FYI in some cases we don't allow `None`, which this doesn't take account of.
 # # FYI the `str` is for a size string, e.g. "16MB", supported by dask.
-T_ChunkDim: TypeAlias = str | int | Literal["auto"] | None | tuple[int, ...]
+T_ChunkDim: TypeAlias = int | Literal["auto"] | None | tuple[int, ...]
 # We allow the tuple form of this (though arguably we could transition to named dims only)
 T_Chunks: TypeAlias = T_ChunkDim | Mapping[Any, T_ChunkDim]