Bug 1568685 - Mark pointerlock test as intermittent on all desktop, r=nikkis

Differential Revision: https://phabricator.services.mozilla.com/D39396

--HG--
extra : moz-landing-system : lando

testing/web-platform/meta/pointerevents/pointerlock/pointerevent_movementxy_with_pointerlock.html.ini

@@ -1,9 +1,6 @@
 [pointerevent_movementxy_with_pointerlock.html]
   [mouse pointerevent movementX/Y with pointerlock test]
     expected:
-      if (os == "win"): ["FAIL", "PASS"]
-      if (os == "linux") and webrender and not debug: ["PASS", "FAIL"]
-      if (os == "linux") and webrender and debug: ["PASS", "FAIL"]
-      if (os == "mac") and not debug: ["PASS", "FAIL"]
       if os == "android": FAIL
+      [PASS, FAIL]