Bug 1588778 - Enable dom/tests/mochitest/bugs/test_bug369306.html for fission debug build r=mccr8

Differential Revision: https://phabricator.services.mozilla.com/D49722

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

dom/tests/mochitest/bugs/mochitest.ini

@@ -62,7 +62,6 @@ skip-if = fission
 [test_bug346659.html]
 skip-if = fission || (toolkit == 'android' && !is_fennec && debug)
 [test_bug369306.html]
-skip-if = (fission && debug)
 [test_bug370098.html]
 [test_bug377539.html]
 [test_bug384122.html]