Remove integrated_error_tracking feature flag

Integrated error tracking feature is available to users. It still needs
to be enabled per project. See documentation.

Changelog: removed
Signed-off-by: Dmytro Zaporozhets <dzaporozhets@gitlab.com>

app/models/error_tracking/project_error_tracking_setting.rb

@@ -51,7 +51,7 @@ module ErrorTracking
     end
 
     def integrated_client?
-      integrated && ::Feature.enabled?(:integrated_error_tracking, project)
+      integrated
     end
 
     def api_url=(value)

config/feature_flags/development/integrated_error_tracking.yml

----
-name: integrated_error_tracking
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/65767
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/335846
-milestone: '14.1'
-type: development
-group: group::monitor
-default_enabled: false

db/fixtures/development/31_error_tracking.rb

@@ -33,11 +33,6 @@ Gitlab::Seeder.quiet do
   Project.not_mass_generated.visible_to_user(admin_user).sample(1).each do |project|
     puts "\nActivating integrated error tracking for the '#{project.full_path}' project"
 
-    unless Feature.enabled?(:integrated_error_tracking, project)
-      puts '- enabling feature flag'
-      Feature.enable(:integrated_error_tracking, project)
-    end
-
     puts '- enabling in settings'
     project.error_tracking_setting || project.create_error_tracking_setting
     project.error_tracking_setting.update!(enabled: true, integrated: true)

doc/operations/error_tracking.md

@@ -123,22 +123,6 @@ settings. By using a GitLab-provided DSN, your application connects to GitLab to
 Those errors are stored in the GitLab database and rendered by the GitLab UI, in the same way as
 Sentry integration.
 
-### Feature flag
-
-The integrated error tracking feature is behind a feature flag that is disabled by default.
-
-To enable it:
-
-```ruby
-Feature.enable(:integrated_error_tracking)
-```
-
-To disable it:
-
-```ruby
-Feature.disable(:integrated_error_tracking)
-```
-
 ### Project settings
 
 The feature should be enabled on the project level. However, there is no UI to enable this feature yet.

spec/models/error_tracking/project_error_tracking_setting_spec.rb

@@ -478,18 +478,17 @@ RSpec.describe ErrorTracking::ProjectErrorTrackingSetting do
   describe '#sentry_enabled' do
     using RSpec::Parameterized::TableSyntax
 
-    where(:enabled, :integrated, :feature_flag, :sentry_enabled) do
-      true  | false | false | true
-      true  | true  | false | true
-      true  | true  | true  | false
-      false | false | false | false
+    where(:enabled, :integrated, :sentry_enabled) do
+      true  | false | true
+      true  | true  | false
+      true  | true  | false
+      false | false | false
     end
 
     with_them do
       before do
         subject.enabled = enabled
         subject.integrated = integrated
-        stub_feature_flags(integrated_error_tracking: feature_flag)
       end
 
       it { expect(subject.sentry_enabled).to eq(sentry_enabled) }

spec/requests/api/error_tracking_collector_spec.rb

@@ -48,14 +48,6 @@ RSpec.describe API::ErrorTrackingCollector do
       it_behaves_like 'not found'
     end
 
-    context 'feature flag is disabled' do
-      before do
-        stub_feature_flags(integrated_error_tracking: false)
-      end
-
-      it_behaves_like 'not found'
-    end
-
     context 'auth headers are missing' do
       let(:headers) { {} }