Remove obsolete flag from code owner E2E tests

qa/qa/specs/features/ee/browser_ui/3_create/repository/merge_with_code_owner_in_root_group_spec.rb

 # frozen_string_literal: true
 
 module QA
-  # These tests will fail unless the feature flag `skip_web_ui_code_owner_validations` is enabled.
-  # That requirement is temporary. See https://gitlab.com/gitlab-org/gitlab/-/issues/217427
-  # When the flag is no longer needed:
-  #  - the tests will no longer need to toggle it, and
-  #  - the tests will not require admin access, and
-  #  - the tests can be run in live environments
-  # Tracked in https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/511
-  context 'Create', :requires_admin, :skip_live_env do
+  context 'Create' do
     describe 'Codeowners' do
-      before(:context) do
-        @feature_flag = 'skip_web_ui_code_owner_validations'
-        @feature_flag_enabled = Runtime::Feature.enabled?(@feature_flag)
-        Runtime::Feature.enable_and_verify(@feature_flag) unless @feature_flag_enabled
-      end
-
-      after(:context) do
-        Runtime::Feature.disable_and_verify(@feature_flag) unless @feature_flag_enabled
-      end
-
       context 'when the project is in the root group' do
         let(:approver) { Resource::User.fabricate_or_use(Runtime::Env.gitlab_qa_username_1, Runtime::Env.gitlab_qa_password_1) }
         let(:root_group) { Resource::Sandbox.fabricate_via_api! }

qa/qa/specs/features/ee/browser_ui/3_create/repository/merge_with_code_owner_in_subgroup_spec.rb

 # frozen_string_literal: true
 
 module QA
-  # These tests will fail unless the feature flag `skip_web_ui_code_owner_validations` is enabled.
-  # That requirement is temporary. See https://gitlab.com/gitlab-org/gitlab/-/issues/217427
-  # When the flag is no longer needed:
-  #  - the tests will no longer need to toggle it, and
-  #  - the tests will not require admin access, and
-  #  - the tests can be run in live environments
-  # Tracked in https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/511
-  context 'Create', :requires_admin, :skip_live_env do
+  context 'Create' do
     describe 'Codeowners' do
-      before(:context) do
-        @feature_flag = 'skip_web_ui_code_owner_validations'
-        @feature_flag_enabled = Runtime::Feature.enabled?(@feature_flag)
-        Runtime::Feature.enable_and_verify(@feature_flag) unless @feature_flag_enabled
-      end
-
-      after(:context) do
-        Runtime::Feature.disable_and_verify(@feature_flag) unless @feature_flag_enabled
-      end
-
       context 'when the project is in a subgroup' do
         let(:approver) { Resource::User.fabricate_or_use(Runtime::Env.gitlab_qa_username_1, Runtime::Env.gitlab_qa_password_1) }
         let(:project) do