rust-cpython: remove useless wrappers from PyLeaked, just move by map()
This series prepares for migrating to the upstreamed version of PySharedRef.
I found this last batch wasn't queued while rewriting the callers.
While Option<T> was historically needed, it shouldn't be required anymore.
I wasn't aware that each filed can be just moved.
[tool.black]
line-length = 80
exclude = '''
build/
| wheelhouse/
| dist/
| packages/
| \.hg/
| \.mypy_cache/
| \.venv/
| mercurial/thirdparty/
'''
skip-string-normalization = true
quiet = true