do not build image on dev branches

Author: Hedius

.gitlab-ci.yml

@@ -34,19 +34,3 @@ docker-build-master:
     - docker push "$CI_REGISTRY_IMAGE"
   only:
     - master
-
-docker-build-dev:
-  # Official docker image.
-  image: docker:latest
-  stage: build
-  tags:
-    - docker
-  services:
-    - docker:dind
-  before_script:
-    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
-  script:
-    - docker build --pull -t "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG" .
-    # - docker push "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG"
-  except:
-    - master