Remove unneeded F401 "Unused import" suppressions

In git.types.

It appears Ruff, unlike flake8, recognizes "import X as X" to mean
that "X" should not be considered unused, even when it appears
outside a .pyi type stub file where that notation is more commonly
used.

Those imports in git.types may benefit from being changed in some
way that uses a syntax whose intent is clearer in context, and
depending on how that is done it may even be necessary to bring
back suppressions. If so, they can be written more specifically.
(For now, changing them would express more than is known about what
names that are only present in git.types becuase it imports them
should continue to be imported, should be considered conceptually
public, or should be condered suitable for use within GitPython.)

Author: EliahKagan

git/types.py

@@ -3,7 +3,7 @@
 
 import os
 import sys
-from typing import (  # noqa: F401
+from typing import (
     Any,
     Callable,
     Dict,
@@ -17,15 +17,15 @@
 )
 
 if sys.version_info >= (3, 8):
-    from typing import (  # noqa: F401
+    from typing import (
         Literal,
         Protocol,
         SupportsIndex as SupportsIndex,
         TypedDict,
         runtime_checkable,
     )
 else:
-    from typing_extensions import (  # noqa: F401
+    from typing_extensions import (
         Literal,
         Protocol,
         SupportsIndex as SupportsIndex,