Runner helper no longer required for Gitlab CI

Author: andypost

ci/Dockerfile

@@ -1,7 +1,3 @@
 FROM skilldlabs/docker-phpcs-drupal:latest
 
-RUN apk add --no-cache git \
-  && curl -o /usr/bin/gitlab-ci-multi-runner https://gitlab-ci-multi-runner-downloads.s3.amazonaws.com/master/binaries/gitlab-ci-multi-runner-linux-amd64 \
-  && chmod +x /usr/bin/gitlab-ci-multi-runner \
-  && ln -s /usr/bin/gitlab-ci-multi-runner /usr/bin/gitlab-runner \
-  && ln -s /usr/bin/gitlab-ci-multi-runner /usr/bin/gitlab-runner-helper
+RUN apk add --no-cache --update git