tests: fix test-update-branches to remove non-conflicting file I was clearly very sloppy when I wrote the test case for experimental.updatecheck=noconflict. The test case that checks that one can move between commits with a removed file was deleting a file that was modified between the source and target commits, which resulted in a "change/delete" conflict. Since that is a conlict, the update correctly failed. Let's fix the test by removing a file that is not modified between the two commits.

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