Merge branch '44902-remove-rake-test-ci' into 'master'

Remove Rake test_ci task

Closes #44902

See merge request gitlab-org/gitlab-ce!18139

changelogs/unreleased/44902-remove-rake-test-ci.yml

+---
+title: Remove test_ci rake task
+merge_request: 18139
+author: Takuya Noguchi
+type: other

lib/tasks/test.rake

@@ -4,8 +4,3 @@ desc "GitLab | Run all tests"
 task :test do
   Rake::Task["gitlab:test"].invoke
 end
-
-unless Rails.env.production?
-  desc "GitLab | Run all tests on CI with simplecov"
-  task test_ci: [:rubocop, :brakeman, :karma, :spinach, :spec]
-end