Revert "Merge branch 'fix/gb/ci-build-stuck-badge-performance-experiment' into 'master'"

This reverts merge request !50521

app/models/ci/build.rb

@@ -726,13 +726,7 @@ module Ci
     end
 
     def any_runners_online?
-      project.any_runners? do |runner|
-        if Feature.enabled?(:ci_build_stuck_badge_performance_experiment, project, type: :development, default_enabled: false)
-          runner.active? && runner.online?
-        else
-          runner.active? && runner.online? && runner.can_pick?(self)
-        end
-      end
+      project.any_runners? { |runner| runner.active? && runner.online? && runner.can_pick?(self) }
     end
 
     def stuck?

changelogs/unreleased/fix-gb-ci-build-stuck-badge-performance-experiment.yml

----
-title: Add build stuck badge performance experiment
-merge_request: 50521
-author:
-type: performance

config/feature_flags/development/ci_build_stuck_badge_performance_experiment.yml

----
-name: ci_build_stuck_badge_performance_experiment
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/50521
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/295490
-milestone: '13.7'
-type: development
-group: group::continuous integration
-default_enabled: false

spec/models/ci/build_spec.rb

@@ -580,27 +580,9 @@ RSpec.describe Ci::Build do
         is_expected.to be_falsey
       end
 
-      context 'when runners are on-line but none can pick a build' do
-        before do
-          allow_any_instance_of(Ci::Runner)
-            .to receive(:can_pick?).and_return(false)
-        end
-
-        context 'when a performance experiement feature flag is enabled' do
-          before do
-            stub_feature_flags(ci_build_stuck_badge_performance_experiment: true)
-          end
-
-          it { is_expected.to be_truthy }
-        end
-
-        context 'when a performance experiment is not running' do
-          before do
-            stub_feature_flags(ci_build_stuck_badge_performance_experiment: false)
-          end
-
-          it { is_expected.to be_falsey }
-        end
+      it 'that cannot handle build' do
+        expect_any_instance_of(Ci::Runner).to receive(:can_pick?).and_return(false)
+        is_expected.to be_falsey
       end
     end
   end