Merge branch 'fix-remove-cache-key-karma' into 'master'

Remove unnecessary cache definition in rake karma test

Closes #32119

See merge request !11306

.gitlab-ci.yml

@@ -408,9 +408,6 @@ rake gitlab:assets:compile:
     - webpack-report/
 
 rake karma:
-  cache:
-    paths:
-      - vendor/ruby
   stage: test
   <<: *use-pg
   <<: *dedicated-runner