Redundant `| None` types in the argument types

[Andrej730]

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On the left it's bpy/utils/__init__.py from fake-bpy, on the right - Blender 4.1 bpy/utils/__init__.py.

Note two issues:

1. path and create have a redundant | None in their types.
2. Signature is missing *, making path and create not keyword-only though they actually are.