Remove inaccurate comments (#23056)

These comments are inaccurate. Even if `convert_case` provided a way to
customize which boundaries were used (which is now does, it 0.7.1), they
would be removed from the string and replaced with the new boundary
character (`-`, `_`, ...), and we'd lose the ability to reconstruct the
text the way the author formatted it. This is not a hack, this is the
way we have to do it.

Release Notes:

- N/A
85b727c1a2Joseph T. Lyons committed on 1/13/2025, 8:38:44 PM· committed by GitHubparentbd3c7d6
2 files changedLine totals unavailable