Disable the ee_compat_check task on dev

We usually use it for security fixes that don't need to be ported to EE
and the task seems to hang when run against the security branch.
Signed-off-by: Rémy Coutable <remy@rymai.me>

.gitlab-ci.yml

@@ -229,7 +229,6 @@ rake ee_compat_check:
   <<: *exec
   only:
     - branches@gitlab-org/gitlab-ce
-    - branches@gitlab/gitlabhq
   except:
     - master
     - tags