Remove the FF ci_needs_optional

It was enabled by default for 2 milestones.

Changelog: other

config/feature_flags/development/ci_needs_optional.yml

----
-name: ci_needs_optional
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/55468
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/323891
-milestone: '13.10'
-type: development
-group: group::pipeline authoring
-default_enabled: true

doc/ci/yaml/README.md

@@ -2069,14 +2069,7 @@ To download artifacts from a job in the current pipeline, use the basic form of
 #### Optional `needs`
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/30680) in GitLab 13.10.
-> - [Deployed behind a feature flag](../../user/feature_flags.md), disabled by default.
-> - [Enabled by default](https://gitlab.com/gitlab-org/gitlab/-/issues/323891) in GitLab 13.11.
-> - Enabled on GitLab.com.
-> - Recommended for production use.
-> - For GitLab self-managed instances, GitLab administrators can opt to [disable it](#enable-or-disable-optional-needs). **(FREE SELF)**
-
-WARNING:
-This feature might not be available to you. Check the **version history** note above for details.
+> - [Feature flag removed](https://gitlab.com/gitlab-org/gitlab/-/issues/323891) in GitLab 14.0.
 To need a job that sometimes does not exist in the pipeline, add `optional: true`
 to the `needs` configuration. If not defined, `optional: false` is the default.
@@ -2110,25 +2103,6 @@ rspec:
       optional: true
 ```
-#### Enable or disable optional needs **(FREE SELF)**
-
-Optional needs 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_needs_optional)
-```
-
-To disable it:
-
-```ruby
-Feature.disable(:ci_needs_optional)
-```
-
 ### `tags`
 Use `tags` to select a specific runner from the list of all runners that are

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

@@ -35,14 +35,9 @@ def type
             end
             def value
-              if ::Feature.enabled?(:ci_needs_optional, default_enabled: :yaml)
-                { name: @config,
-                  artifacts: true,
-                  optional: false }
-              else
-                { name: @config,
-                  artifacts: true }
-              end
+              { name: @config,
+                artifacts: true,
+                optional: false }
             end
           end
@@ -66,14 +61,9 @@ def type
             end
             def value
-              if ::Feature.enabled?(:ci_needs_optional, default_enabled: :yaml)
-                { name: job,
-                  artifacts: artifacts || artifacts.nil?,
-                  optional: !!optional }
-              else
-                { name: job,
-                  artifacts: artifacts || artifacts.nil? }
-              end
+              { name: job,
+                artifacts: artifacts || artifacts.nil?,
+                optional: !!optional }
             end
           end

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

@@ -146,7 +146,7 @@ def needs_errors
             end
             @needs_attributes.flat_map do |need|
-              next if ::Feature.enabled?(:ci_needs_optional, default_enabled: :yaml) && need[:optional]
+              next if need[:optional]
               result = @previous_stages.any? do |stage|
                 stage.seeds_names.include?(need[:name])

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

@@ -25,16 +25,6 @@
         it 'returns job needs configuration' do
           expect(need.value).to eq(name: 'job_name', artifacts: true, optional: false)
         end
-
-        context 'when the FF ci_needs_optional is disabled' do
-          before do
-            stub_feature_flags(ci_needs_optional: false)
-          end
-
-          it 'returns job needs configuration without `optional`' do
-            expect(need.value).to eq(name: 'job_name', artifacts: true)
-          end
-        end
       end
       it_behaves_like 'job type'
@@ -134,16 +124,6 @@
         it 'returns job needs configuration' do
           expect(need.value).to eq(name: 'job_name', artifacts: true, optional: true)
         end
-
-        context 'when the FF ci_needs_optional is disabled' do
-          before do
-            stub_feature_flags(ci_needs_optional: false)
-          end
-
-          it 'returns job needs configuration without `optional`' do
-            expect(need.value).to eq(name: 'job_name', artifacts: true)
-          end
-        end
       end
     end

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

@@ -1101,17 +1101,6 @@
         it "does not return an error" do
           expect(subject.errors).to be_empty
         end
-
-        context 'when the FF ci_needs_optional is disabled' do
-          before do
-            stub_feature_flags(ci_needs_optional: false)
-          end
-
-          it "returns an error" do
-            expect(subject.errors).to contain_exactly(
-              "'rspec' job needs 'build' job, but it was not added to the pipeline")
-          end
-        end
       end
     end