[pyupgrade] make fix unsafe if it deletes comments (UP010, unnecessary-future-import) #18291
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/closes #18282
Summary
The
unnecessary-future-import
(UP010) fix should be marked as unsafe when it deletes a comment on the same line as the import. Currently, the fix removes the entire line including comments, which may cause unintended code/comment loss. This change ensures that such fixes are flagged as unsafe and require manual review.Test Plan