Remove confluence_integration feature flag

https://gitlab.com/gitlab-org/gitlab/-/issues/228731

app/models/project.rb

@@ -384,7 +384,9 @@ class Project < ApplicationRecord
   delegate :default_git_depth, :default_git_depth=, to: :ci_cd_settings, prefix: :ci
   delegate :forward_deployment_enabled, :forward_deployment_enabled=, :forward_deployment_enabled?, to: :ci_cd_settings
   delegate :actual_limits, :actual_plan_name, to: :namespace, allow_nil: true
-  delegate :allow_merge_on_skipped_pipeline, :allow_merge_on_skipped_pipeline?, :allow_merge_on_skipped_pipeline=, to: :project_setting
+  delegate :allow_merge_on_skipped_pipeline, :allow_merge_on_skipped_pipeline?,
+    :allow_merge_on_skipped_pipeline=, :has_confluence?,
+    to: :project_setting
   delegate :active?, to: :prometheus_service, allow_nil: true, prefix: true
 
   # Validations
@@ -1287,11 +1289,6 @@ class Project < ApplicationRecord
     update_column(:has_external_wiki, services.external_wikis.any?) if Gitlab::Database.read_write?
   end
 
-  def has_confluence?
-    ConfluenceService.feature_enabled?(self) && # rubocop:disable CodeReuse/ServiceClass
-      project_setting.has_confluence?
-  end
-
   def find_or_initialize_services
     available_services_names = Service.available_services_names - disabled_services
 
@@ -1301,11 +1298,7 @@ class Project < ApplicationRecord
   end
 
   def disabled_services
-    strong_memoize(:disabled_services) do
-      [].tap do |disabled_services|
-        disabled_services.push(ConfluenceService.to_param) unless ConfluenceService.feature_enabled?(self) # rubocop:disable CodeReuse/ServiceClass
-      end
-    end
+    []
   end
 
   def find_or_initialize_service(name)

app/models/project_services/confluence_service.rb

@@ -7,8 +7,6 @@ class ConfluenceService < Service
   VALID_HOST_MATCH = %r{\A.+\.atlassian\.net\Z}.freeze
   VALID_PATH_MATCH = %r{\A/wiki(/|\Z)}.freeze
 
-  FEATURE_FLAG = :confluence_integration
-
   prop_accessor :confluence_url
 
   validates :confluence_url, presence: true, if: :activated?
@@ -16,10 +14,6 @@ class ConfluenceService < Service
 
   after_commit :cache_project_has_confluence
 
-  def self.feature_enabled?(actor)
-    ::Feature.enabled?(FEATURE_FLAG, actor)
-  end
-
   def self.to_param
     'confluence'
   end

changelogs/unreleased/220934-confluence-wiki-remove-flag.yml

+---
+title: Add new Confluence integration for projects
+merge_request: 36781
+author:
+type: added

spec/models/project_spec.rb

@@ -1042,32 +1042,6 @@ RSpec.describe Project do
     end
   end
 
-  describe '#has_confluence?' do
-    let_it_be(:project) { build_stubbed(:project) }
-
-    it 'returns false when project_setting.has_confluence property is false' do
-      project.project_setting.has_confluence = false
-
-      expect(project.has_confluence?).to be(false)
-    end
-
-    context 'when project_setting.has_confluence property is true' do
-      before do
-        project.project_setting.has_confluence = true
-      end
-
-      it 'returns true' do
-        expect(project.has_confluence?).to be(true)
-      end
-
-      it 'returns false when confluence integration feature flag is disabled' do
-        stub_feature_flags(ConfluenceService::FEATURE_FLAG => false)
-
-        expect(project.has_confluence?).to be(false)
-      end
-    end
-  end
-
   describe '#external_wiki' do
     let(:project) { create(:project) }
 
@@ -5412,20 +5386,6 @@ RSpec.describe Project do
       expect(services.count).to eq(2)
       expect(services.map(&:title)).to eq(['JetBrains TeamCity CI', 'Pushover'])
     end
-
-    describe 'interaction with the confluence integration feature flag' do
-      it 'contains a ConfluenceService when feature flag is enabled' do
-        stub_feature_flags(ConfluenceService::FEATURE_FLAG => true)
-
-        expect(subject.find_or_initialize_services).to include(ConfluenceService)
-      end
-
-      it 'does not contain a ConfluenceService when the confluence integration feature flag is disabled' do
-        stub_feature_flags(ConfluenceService::FEATURE_FLAG => false)
-
-        expect(subject.find_or_initialize_services).not_to include(ConfluenceService)
-      end
-    end
   end
 
   describe '#find_or_initialize_service' do