Raise job rules without workflow warnings by default

This removes the ci_raise_job_rules_without_workflow_rules
_warning feature flag, enabling the warnings for ci yaml
files to be raised for job rules that do not contain workflow
rules

Changelog: changed

config/feature_flags/development/ci_raise_job_rules_without_workflow_rules_warning.yml

----
-name: ci_raise_job_rules_without_workflow_rules_warning
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/38387
-rollout_issue_url: 
-milestone: '13.3'
-type: development
-group: group::continuous integration
-default_enabled: true

lib/gitlab/ci/config/entry/processable.rb

@@ -98,7 +98,6 @@ module Gitlab
           def validate_against_warnings
             # If rules are valid format and workflow rules are not specified
             return unless rules_value
-            return unless Gitlab::Ci::Features.raise_job_rules_without_workflow_rules_warning?
 
             last_rule = rules_value.last
 

lib/gitlab/ci/features.rb

@@ -22,10 +22,6 @@ module Gitlab
         Feature.enabled?(:merge_base_pipeline_for_metrics_comparison, project, default_enabled: :yaml)
       end
 
-      def self.raise_job_rules_without_workflow_rules_warning?
-        ::Feature.enabled?(:ci_raise_job_rules_without_workflow_rules_warning, default_enabled: true)
-      end
-
       # NOTE: The feature flag `disallow_to_create_merge_request_pipelines_in_target_project`
       # is a safe switch to disable the feature for a particular project when something went wrong,
       # therefore it's not supposed to be enabled by default.

spec/lib/gitlab/ci/config/entry/processable_spec.rb

@@ -271,10 +271,8 @@ RSpec.describe Gitlab::Ci::Config::Entry::Processable do
 
     context 'when workflow rules is not used' do
       let(:workflow) { double('workflow', 'has_rules?' => false) }
-      let(:feature_flag_value) { true }
 
       before do
-        stub_feature_flags(ci_raise_job_rules_without_workflow_rules_warning: feature_flag_value)
         entry.compose!(deps)
       end
 
@@ -298,12 +296,6 @@ RSpec.describe Gitlab::Ci::Config::Entry::Processable do
             it 'raises a warning' do
               expect(entry.warnings).to contain_exactly(/may allow multiple pipelines/)
             end
-
-            context 'when feature flag is disabled' do
-              let(:feature_flag_value) { false }
-
-              it_behaves_like 'has no warnings'
-            end
           end
 
           context 'and its value is `never`' do

spec/lib/gitlab/ci/yaml_processor_spec.rb

@@ -485,10 +485,6 @@ module Gitlab
       end
 
       describe '#warnings' do
-        before do
-          stub_feature_flags(ci_raise_job_rules_without_workflow_rules_warning: true)
-        end
-
         context 'when a warning is raised in a given entry' do
           let(:config) do
             <<-EOYML
@@ -602,27 +598,6 @@ module Gitlab
             it_behaves_like 'has warnings and expected error', /build job: need test is not defined in prior stages/
           end
         end
-
-        context 'when feature flag is disabled' do
-          before do
-            stub_feature_flags(ci_raise_job_rules_without_workflow_rules_warning: false)
-          end
-
-          context 'job rules used without workflow rules' do
-            let(:config) do
-              <<-EOYML
-                rspec:
-                  script: rspec
-                  rules:
-                    - when: always
-              EOYML
-            end
-
-            it 'does not raise the warning' do
-              expect(subject.warnings).to be_empty
-            end
-          end
-        end
       end
 
       describe 'only / except policies validations' do

spec/services/ci/create_pipeline_service/creation_errors_and_warnings_spec.rb

@@ -14,7 +14,6 @@ RSpec.describe Ci::CreatePipelineService do
 
     before do
       stub_ci_pipeline_yaml_file(config)
-      stub_feature_flags(ci_raise_job_rules_without_workflow_rules_warning: true)
     end
 
     context 'when created successfully' do
@@ -35,18 +34,6 @@ RSpec.describe Ci::CreatePipelineService do
             /jobs:test may allow multiple pipelines to run/
           )
         end
-
-        context 'when feature flag is disabled for the particular warning' do
-          before do
-            stub_feature_flags(ci_raise_job_rules_without_workflow_rules_warning: false)
-          end
-
-          it 'does not contain warnings' do
-            expect(pipeline.error_messages.map(&:content)).to be_empty
-
-            expect(pipeline.warning_messages.map(&:content)).to be_empty
-          end
-        end
       end
 
       context 'when no warnings are raised' do