tests: Don't disable cert verification for QtWebKit

This was added in d385206ea0 'to not hang on unexpected SSL errors', but there is no reason those should happen in tests.

tests/end2end/fixtures/quteprocess.py

@@ -647,9 +647,6 @@ class QuteProc(testprocess.Process):
             ('auto_save.interval', '0'),
             ('new_instance_open_target_window', 'last-opened')
         ]
-        # FIXME needed?
-        if not self.request.config.webengine:
-            settings.append(('content.tls.certificate_errors', 'load-insecurely'))
 
         for opt, value in settings:
             self.set_setting(opt, value)