Remove Style/RegexpLiteralMixedPreserve from todo

- all resolved.

.rubocop_manual_todo.yml

@@ -2458,31 +2458,6 @@ Gitlab/FeatureAvailableUsage:
     - 'lib/api/helpers/related_resources_helpers.rb'
     - 'spec/models/concerns/featurable_spec.rb'
 
-# WIP See https://gitlab.com/gitlab-org/gitlab/-/issues/327490
-Style/RegexpLiteralMixedPreserve:
-  Exclude:
-    - 'qa/qa/page/project/settings/advanced.rb'
-    - 'qa/spec/service/docker_run/gitlab_runner_spec.rb'
-    - 'rubocop/cop/gitlab/duplicate_spec_location.rb'
-    - 'spec/features/clusters/cluster_health_dashboard_spec.rb'
-    - 'spec/features/markdown/metrics_spec.rb'
-    - 'spec/features/search/user_searches_for_code_spec.rb'
-    - 'spec/features/snippets/embedded_snippet_spec.rb'
-    - 'spec/helpers/diff_helper_spec.rb'
-    - 'spec/helpers/releases_helper_spec.rb'
-    - 'spec/lib/gitlab/ci/reports/test_case_spec.rb'
-    - 'spec/lib/gitlab/consul/internal_spec.rb'
-    - 'spec/lib/gitlab/import_export/shared_spec.rb'
-    - 'spec/lib/gitlab/utils/usage_data_spec.rb'
-    - 'spec/presenters/ci/build_runner_presenter_spec.rb'
-    - 'spec/requests/api/projects_spec.rb'
-    - 'spec/services/jira/requests/projects/list_service_spec.rb'
-    - 'spec/support/capybara.rb'
-    - 'spec/support/helpers/grafana_api_helpers.rb'
-    - 'spec/support/helpers/query_recorder.rb'
-    - 'spec/support/helpers/require_migration.rb'
-    - 'spec/views/layouts/_head.html.haml_spec.rb'
-
 # WIP see: https://gitlab.com/gitlab-org/gitlab/-/issues/335808
 Database/MultipleDatabases:
   Exclude: