Bug 1595188 - Disable browser_contextual_identity.js for fission; r=bradwerth

If the test only fails today with fission with the old RDM, then it makes no
sense to fix that now. Better wait for the new RDM to be enabled as it will
probably change how this test runs.

Differential Revision: https://phabricator.services.mozilla.com/D57798

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

devtools/client/responsive/test/browser/browser.ini

@@ -30,6 +30,7 @@ support-files =
 skip-if = fission
 [browser_contextmenu_inspect.js]
 [browser_contextual_identity.js]
+skip-if = fission # No need to fix this test to run with fission before the new RDM is ready
 [browser_device_change.js]
 [browser_device_custom_edit.js]
 [browser_device_custom_remove.js]