Bug 1769438 - Disable browser_userContextId_openWindow.js because it always fails. r=dom-worker-reviewers,jesup DONTBUILD

This test always fails, and it should be always disabled, but for some reason
it is run in verify mode, on most (but not all) platforms.

Differential Revision: https://phabricator.services.mozilla.com/D146385

dom/serviceworkers/test/browser-common.ini

@@ -45,5 +45,4 @@ skip-if = true # Crashes: @ mozilla::dom::ServiceWorkerManagerService::Propagate
 [browser_storage_recovery.js]
 [browser_unregister_with_containers.js]
 [browser_userContextId_openWindow.js]
-skip-if = !e10s
+skip-if = true # See bug 1769437.
-  serviceworker_e10s