Bug 1531737 - Enable browser_switchToTab_closes_newtab.js. r=Standard8

Differential Revision: https://phabricator.services.mozilla.com/D22089

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

browser/components/urlbar/tests/browser/browser.ini

@@ -70,7 +70,6 @@ support-files =
 [browser_switchTab_override.js]
 skip-if = ((os == 'win') && verify && debug)
 [browser_switchToTab_closes_newtab.js]
-skip-if = true # Bug 1531737 - fails when run after browser_switchTab_override.js
 [browser_switchToTab_fullUrl_repeatedKeydown.js]
 [browser_switchToTabHavingURI_aOpenParams.js]
 [browser_tabMatchesInAwesomebar_perwindowpb.js]