ci: remove nightly CI run for 11.2.x branch

We disable the nightly CI runs for this branch as version 11 is no longer in LTS.

Author: alan-agius4

.circleci/config.yml

@@ -411,30 +411,3 @@ workflows:
             - build
             - test
             - e2e-cli
-
-  nightly:
-    triggers:
-      - schedule:
-          cron: "0 0 * * *"
-          filters:
-            branches:
-              only:
-                - 11.2.x
-    jobs:
-      # Linux jobs
-      - setup
-      - build:
-          requires:
-            - setup
-      - e2e-cli:
-          name: e2e-cli-nightly
-          requires:
-            - build
-      - e2e-cli:
-          name: e2e-cli-ve-nightly
-          ve: true
-          requires:
-            - build
-      - test-browsers:
-          requires:
-            - build