Revert "Check that SauceLabs endpoint is targeted in SauceLabs view"

Sauce Connect forwards localhost calls to SauceLabs, so the heuristic based on hostname would fail in this case, and prevent a legit use-case

This reverts commit cd2f7abfc8df0a8fb84a464d8028e3af3f81708c.
Warn if using SauceLabs without always quitting browser