Remove unused Gitlab::Diff code
What does this MR do?
Remove some unused code.
Are there points in the code the reviewer needs to double check?
Why was this MR needed?
The code has the potential of making an unrealistic number of Gitaly requests.
Screenshots (if relevant)
Does this MR meet the acceptance criteria?
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Changelog entry added, if necessary -
Documentation created/updated -
API support added - Tests
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Added for this feature/bug -
All builds are passing
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- Review
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Has been reviewed by UX -
Has been reviewed by Frontend -
Has been reviewed by Backend -
Has been reviewed by Database
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Conform by the merge request performance guides -
Conform by the style guides -
Branch has no merge conflicts with master(if it does - rebase it please) -
Squashed related commits together