Imported as: https://codein.withgoogle.com/dashboard/tasks/6632253803200512/

Rather than using the same as core I propose it is simply removed. Similar to the PHPUnit entry point, extensions are not meant to create their own QUnit context because the needed information exists only in core.

MediaWiki core already has working entry points for phpunit and qunit. I suggest you use those instead. They include any registered extensions' test suites, and the current code in Gather and MobileFrontend already makes use of that, so nothing would change, except the directory from which you run the grunt qunit command.

Purpose is to be able to run unit tests on a pre-commit/pre-git-review hook. If we can remove them and still keep them working on a pre-commit hook that would be acceptable.