F401 not within diffs

[zoidyzoidzoid]

I recently had a commit where I removed some code, which then ended up causing an F401(Unused import), which fell outside the diff.

It would be nice to still comment on the PR that the changes caused the unused import.

It would be complicated to determine that the unused import was caused by this diff, but I think it might be okay to assume that before the PR the files had no unused imports.

[markstory]

That will be tricky for sure, outside of special casing python linters and analyzing the entire file I don't know how it would work.