Bug 1600874 - Enable browser_identityPopup_clearSiteData.js on fission. r=pbz

Differential Revision: https://phabricator.services.mozilla.com/D80868

browser/base/content/test/siteIdentity/browser.ini

@@ -56,7 +56,7 @@ support-files =
   file_mixedPassiveContent.html
   file_csp_block_all_mixedcontent.html
 [browser_identityPopup_clearSiteData.js]
-skip-if = (fission && debug) || (os == "linux" && bits == 64) # Bug 1577395
+skip-if = (os == "linux" && bits == 64) # Bug 1577395
 [browser_identityPopup_custom_roots.js]
 [browser_identityPopup_focus.js]
 [browser_mcb_redirect.js]