Remove front-end test stubs that do nothing but report spurious errors

This one is open to some debate.

These "tests" are never executed. They do appear as errors in IntelliJ, either because Protractor cannot be found (because it no longer exists and cannot be installed) or because the API of the component changed after it was initially created. In no case have we gone back and written more complex tests with these.

In my opinion, they should be removed because they just contribute noise and clutter.

If someone else has a strong opinion that they should remain for some reason, please share it and if we agree I can close this MR.