ci: Stop running Review Apps on `master` scheduled pipelines

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

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

@@ -1582,7 +1582,6 @@
       allow_failure: true
     - <<: *if-dot-com-gitlab-org-merge-request
       changes: *qa-patterns
-    - <<: *if-dot-com-gitlab-org-schedule
 
 .review:rules:review-build-cng:
   rules:

doc/development/testing_guide/review_apps.md

@@ -15,7 +15,6 @@ For any of the following scenarios, the `start-review-app-pipeline` job would be
 - for merge requests with CI config changes
 - for merge requests with frontend changes
 - for merge requests with QA changes
-- for scheduled pipelines
 - the MR has the `pipeline:run-review-app` label set
 
 ## QA runs on Review Apps