Sauce Labs test runner enters infinite loop when testing MS Edge 13 on Windows 10

https://github.com/jashkenas/backbone/actions/runs/7791166953/job/21246628849

Perhaps they removed support for that browser or something. In any case, it should probably be removed from the Karma config.

Start with the linked GitHub Actions job and locate the Karma configuration used by the Sauce Labs runner. Check how MS Edge 13 is listed, then remove that browser entry and verify the test runner completes without entering the reported loop.

Written by the indexing model from the issue text.