Remove duplication from .gitlab-ci.yml

Signed-off-by: Rémy Coutable <remy@rymai.me>

.gitlab-ci.yml

@@ -63,16 +63,6 @@ stages:
     - redis:alpine
     - elasticsearch:5.1
 
-.only-master-and-ee-or-mysql: &only-master-and-ee-or-mysql
-  only:
-    - /\-(?i)mysql$/
-    - master@gitlab-org/gitlab-ce
-    - master@gitlab/gitlabhq
-    - tags@gitlab-org/gitlab-ce
-    - tags@gitlab/gitlabhq
-    - //@gitlab-org/gitlab-ee
-    - //@gitlab/gitlab-ee
-
 .only-master-and-ee-or-mysql: &only-master-and-ee-or-mysql
   only:
     - /mysql/