CI: remove ci-not-authorized job (#12225)

This is now handled directly at the failfast-ci level (== integration
Github <-> Gitlab).
The whole pipeline will not be triggered unless:
- The author is a maintainer
- The PR has the /ok-to-test label

.gitlab-ci.yml

@@ -55,37 +55,9 @@ before_script:
   extends: .job
   needs:
     - pipeline-image
-    - ci-not-authorized
     - pre-commit            # lint
     - vagrant-validate      # lint
 
-# For failfast, at least 1 job must be defined in .gitlab-ci.yml
-# Premoderated with manual actions
-ci-not-authorized:
-  stage: build
-  before_script: []
-  after_script: []
-  rules:
-    # LGTM or ok-to-test labels
-    - if: $PR_LABELS =~ /.*,(lgtm|approved|ok-to-test).*|^(lgtm|approved|ok-to-test).*/i
-      variables:
-        CI_OK_TO_TEST: '0'
-      when: always
-    - if: $CI_PIPELINE_SOURCE == "schedule" || $CI_PIPELINE_SOURCE == "trigger"
-      variables:
-        CI_OK_TO_TEST: '0'
-    - if: $CI_COMMIT_BRANCH == "master"
-      variables:
-        CI_OK_TO_TEST: '0'
-    - when: always
-      variables:
-        CI_OK_TO_TEST: '1'
-  script:
-    - exit $CI_OK_TO_TEST
-  tags:
-    - ffci
-  needs: []
-
 include:
   - .gitlab-ci/build.yml
   - .gitlab-ci/lint.yml