Bug 1658936 - Remove fail-if for pointerevents/test_trigger_popup_by_pointer_events.html r=smacleod

Differential Revision: https://phabricator.services.mozilla.com/D86975

dom/events/test/pointerevents/mochitest.ini

@@ -122,7 +122,6 @@ support-files =
 support-files =
   file_test_trigger_fullscreen.html
 [test_trigger_popup_by_pointer_events.html]
-fail-if = (xorigin && !fission)
 [test_remove_frame_when_got_pointer_capture.html]
 [test_getCoalescedEvents.html]
 skip-if = !e10s || os == 'android' # Bug 1312791