Remove FF ci_workflow_rules_variables

It's been enabled by default for 2 milestones.

Changelog: other

config/feature_flags/development/ci_workflow_rules_variables.yml

----
-name: ci_workflow_rules_variables
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/52085
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/300997
-milestone: '13.11'
-type: development
-group: group::pipeline authoring
-default_enabled: true

doc/ci/yaml/README.md

@@ -233,15 +233,7 @@ If your rules match both branch pipelines and merge request pipelines,
 #### `workflow:rules:variables`
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/294232) in GitLab 13.11.
-> - [Deployed behind a feature flag](../../user/feature_flags.md), disabled by default.
-> - [Enabled by default](https://gitlab.com/gitlab-org/gitlab/-/issues/300997) in GitLab 13.12.
-> - Enabled on GitLab.com.
-> - Recommended for production use.
-> - For GitLab self-managed instances, GitLab administrators can opt to [disable it](#enable-or-disable-workflowrulesvariables). **(FREE SELF)**
-
-There can be
-[risks when disabling released features](../../user/feature_flags.md#risks-when-disabling-released-features).
-Refer to this feature's version history for more details.
+> - [Feature flag removed](https://gitlab.com/gitlab-org/gitlab/-/issues/300997) in GitLab 14.1.
 
 You can use [`variables`](#variables) in `workflow:rules:` to define variables for specific pipeline conditions.
 
@@ -294,25 +286,6 @@ When the branch is something else:
 - job1's `DEPLOY_VARIABLE` is `job1-default-deploy`.
 - job2's `DEPLOY_VARIABLE` is `default-deploy`.
 
-##### Enable or disable workflow:rules:variables **(FREE SELF)**
-
-workflow:rules:variables is under development but ready for production use.
-It is deployed behind a feature flag that is **enabled by default**.
-[GitLab administrators with access to the GitLab Rails console](../../administration/feature_flags.md)
-can opt to disable it.
-
-To enable it:
-
-```ruby
-Feature.enable(:ci_workflow_rules_variables)
-```
-
-To disable it:
-
-```ruby
-Feature.disable(:ci_workflow_rules_variables)
-```
-
 #### `workflow:rules` templates
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/217732) in GitLab 13.0.

lib/gitlab/ci/pipeline/chain/seed.rb

@@ -10,10 +10,7 @@ module Gitlab
 
           def perform!
             raise ArgumentError, 'missing YAML processor result' unless @command.yaml_processor_result
-
-            if ::Feature.enabled?(:ci_workflow_rules_variables, pipeline.project, default_enabled: :yaml)
-              raise ArgumentError, 'missing workflow rules result' unless @command.workflow_rules_result
-            end
+            raise ArgumentError, 'missing workflow rules result' unless @command.workflow_rules_result
 
             # Allocate next IID. This operation must be outside of transactions of pipeline creations.
             pipeline.ensure_project_iid!
@@ -51,13 +48,9 @@ module Gitlab
           end
 
           def root_variables
-            if ::Feature.enabled?(:ci_workflow_rules_variables, pipeline.project, default_enabled: :yaml)
-              ::Gitlab::Ci::Variables::Helpers.merge_variables(
-                @command.yaml_processor_result.root_variables, @command.workflow_rules_result.variables
-              )
-            else
-              @command.yaml_processor_result.root_variables
-            end
+            ::Gitlab::Ci::Variables::Helpers.merge_variables(
+              @command.yaml_processor_result.root_variables, @command.workflow_rules_result.variables
+            )
           end
         end
       end

lib/gitlab/ci/pipeline/seed/build.rb

@@ -213,8 +213,6 @@ module Gitlab
           end
 
           def recalculate_yaml_variables!
-            return unless ::Feature.enabled?(:ci_workflow_rules_variables, @pipeline.project, default_enabled: :yaml)
-
             @seed_attributes[:yaml_variables] = Gitlab::Ci::Variables::Helpers.inherit_yaml_variables(
               from: @context.root_variables, to: @job_variables, inheritance: @root_variables_inheritance
             )

spec/lib/gitlab/ci/pipeline/chain/seed_spec.rb

@@ -203,18 +203,6 @@ RSpec.describe Gitlab::Ci::Pipeline::Chain::Seed do
 
         expect(rspec_variables['VAR1']).to eq('overridden var 1')
       end
-
-      context 'when the FF ci_workflow_rules_variables is disabled' do
-        before do
-          stub_feature_flags(ci_workflow_rules_variables: false)
-        end
-
-        it 'sends root variable' do
-          run_chain
-
-          expect(rspec_variables['VAR1']).to eq('var 1')
-        end
-      end
     end
 
     context 'N+1 queries' do

spec/lib/gitlab/ci/pipeline/seed/build_spec.rb

@@ -250,19 +250,6 @@ RSpec.describe Gitlab::Ci::Pipeline::Seed::Build do
                { key: 'VAR4', value: 'new var pipeline 4', public: true }]
             )
           end
-
-          context 'when FF ci_workflow_rules_variables is disabled' do
-            before do
-              stub_feature_flags(ci_workflow_rules_variables: false)
-            end
-
-            it 'returns existing yaml variables' do
-              expect(subject[:yaml_variables]).to match_array(
-                [{ key: 'VAR2', value: 'var 2', public: true },
-                 { key: 'VAR3', value: 'var 3', public: true }]
-              )
-            end
-          end
         end
 
         context 'when root_variables_inheritance is false' do

spec/services/ci/create_pipeline_service/rules_spec.rb

@@ -230,22 +230,6 @@ RSpec.describe Ci::CreatePipelineService do
               [nil, nil, nil, 'job var 4', nil, nil, 'overridden var 7']
             )
           end
-
-          context 'when FF ci_workflow_rules_variables is disabled' do
-            before do
-              stub_feature_flags(ci_workflow_rules_variables: false)
-            end
-
-            it 'does not affect workflow variables but job variables' do
-              expect(job1.scoped_variables.to_hash.values_at(*variable_keys)).to eq(
-                ['overridden var 1', 'job var 2', nil, 'workflow var 4', 'job var 5', nil, 'workflow var 7']
-              )
-
-              expect(job2.scoped_variables.to_hash.values_at(*variable_keys)).to eq(
-                [nil, nil, nil, 'job var 4', nil, nil, 'overridden var 7']
-              )
-            end
-          end
         end
 
         context 'when matching to the second rule' do