ci: Remove the `rspec fast_spec_helper minimal` which is useless

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

.gitlab/ci/rails.gitlab-ci.yml

@@ -337,12 +337,6 @@ rspec fast_spec_helper:
   script:
     - bin/rspec spec/fast_spec_helper.rb
 
-rspec fast_spec_helper minimal:
-  extends:
-    - rspec fast_spec_helper
-    - .minimal-rspec-tests
-    - .rails:rules:ee-and-foss-fast_spec_helper:minimal
-
 db:rollback:
   extends: .db-job-base
   script:

.gitlab/ci/rules.gitlab-ci.yml

@@ -967,33 +967,8 @@
       changes: *core-backend-patterns
     - <<: *if-merge-request
       changes: *ci-patterns
-    - <<: *if-automated-merge-request
-      changes: ["config/**/*"]
-    - <<: *if-security-merge-request
-      changes: ["config/**/*"]
-    - <<: *if-merge-request-not-approved
-      when: never
     - changes: ["config/**/*"]
 
-.rails:rules:ee-and-foss-fast_spec_helper:minimal:
-  rules:
-    - <<: *if-merge-request-approved
-      when: never
-    - <<: *if-automated-merge-request
-      when: never
-    - <<: *if-security-merge-request
-      when: never
-    - <<: *if-merge-request-labels-run-all-rspec
-      when: never
-    - <<: *if-merge-request
-      changes: *core-backend-patterns
-      when: never
-    - <<: *if-merge-request
-      changes: *ci-patterns
-      when: never
-    - <<: *if-merge-request
-      changes: ["config/**/*"]
-
 .rails:rules:code-backstage-qa:
   rules:
     - changes: *code-backstage-qa-patterns