DOC: Remove RT03 docstring errors for selected methods
Resolve all RT03 errors for the following cases:

scripts/validate_docstrings.py --format=actions --errors=RT03 pandas.DataFrame.pop
scripts/validate_docstrings.py --format=actions --errors=RT03 pandas.DataFrame.reindex
scripts/validate_docstrings.py --format=actions --errors=RT03 pandas.DataFrame.reorder_levels
scripts/validate_docstrings.py --format=actions --errors=RT03 pandas.DataFrame.swapaxes - deprecated in favor of .transpose, which already has valid docstring
scripts/validate_docstrings.py --format=actions --errors=RT03 pandas.DataFrame.to_numpy
scripts/validate_docstrings.py --format=actions --errors=RT03 pandas.DataFrame.to_orc


xref DOC: fix RT03 errors in docstrings DOC: fix RT03 errors in docstrings  #57416
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [ ] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

Thanks @bergnerjonas 