Can't do anything with a review comment on a deleted file

Steps to reproduce:

  1. Create a merge request.
  2. Start a review on a file in that merge request, but don't submit it.
  3. Delete the file you commented on in the review.

Expected: unsure, but maybe the review comment is deleted? Or at least, it's possible to delete it.

Actual: the review comment only shows up under the 'finish review' button and is not deletable.

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