Cleanup utils.py

Author: dcherian

xarray/core/utils.py

@@ -10,7 +10,6 @@
 import warnings
 from enum import Enum
 from typing import (
-    TYPE_CHECKING,
     Any,
     Callable,
     Collection,
@@ -307,35 +306,18 @@ def _is_scalar(value, include_0d):
     )
 
 
-# See GH5624, this is a convoluted way to allow type-checking to use `TypeGuard` without
-# requiring typing_extensions as a required dependency to _run_ the code (it is required
-# to type-check).
-try:
-    if sys.version_info >= (3, 10):
-        from typing import TypeGuard
-    else:
-        from typing_extensions import TypeGuard
-except ImportError:
-    if TYPE_CHECKING:
-        raise
-    else:
-
-        def is_scalar(value: Any, include_0d: bool = True) -> bool:
-            """Whether to treat a value as a scalar.
-
-            Any non-iterable, string, or 0-D array
-            """
-            return _is_scalar(value, include_0d)
-
-
+if sys.version_info >= (3, 10):
+    from typing import TypeGuard
 else:
+    from typing_extensions import TypeGuard
 
-    def is_scalar(value: Any, include_0d: bool = True) -> TypeGuard[Hashable]:
-        """Whether to treat a value as a scalar.
 
-        Any non-iterable, string, or 0-D array
-        """
-        return _is_scalar(value, include_0d)
+def is_scalar(value: Any, include_0d: bool = True) -> TypeGuard[Hashable]:
+    """Whether to treat a value as a scalar.
+
+    Any non-iterable, string, or 0-D array
+    """
+    return _is_scalar(value, include_0d)
 
 
 def is_valid_numpy_dtype(dtype: Any) -> bool: