Bug 1310297 - Remove test annotations using b2g, mulet or gonk: xpcom. r=RyanVM

MozReview-Commit-ID: DUdntLdSp06

--HG--
extra : rebase_source : 9d4e380bc855e214d1863fb21af956183daad48a

xpcom/tests/unit/xpcshell.ini

@@ -1,7 +1,6 @@
 [DEFAULT]
 head = head_xpcom.js
 tail =
-skip-if = toolkit == 'gonk'
 support-files =
   bug725015.manifest
   compmgr_warnings.manifest