test-and-deploy-tags instead of master in .gitlab-ci.yml

.gitlab-ci.yml

@@ -41,7 +41,7 @@ build-master:
   environment:
     name: staging
 
-test-and-deploy-master:
+test-and-deploy-tags:
   stage: deploy
   image: git.imp.fu-berlin.de:5000/coding-at-fu/debian-testpackage:stretch
   dependencies:
@@ -55,7 +55,6 @@ test-and-deploy-master:
     name: production
   only:
     - tags
-    - master
   artifacts:
     paths:
       - build/*