Merge branch 'bvl-remove-request-deadline-ff' into 'master'

Remove the request_deadline feature flag

See merge request gitlab-org/gitlab!23510

changelogs/unreleased/bvl-remove-request-deadline-ff.yml

+---
+title: Don't allow Gitaly calls to exceed the worker timeout set for unicorn or puma
+merge_request: 23510
+author:
+type: performance

lib/gitlab/request_context.rb

@@ -18,7 +18,6 @@ module Gitlab
     def request_deadline
       strong_memoize(:request_deadline) do
         next unless request_start_time
-        next unless Feature.enabled?(:request_deadline)
 
         request_start_time + max_request_duration_seconds
       end

spec/lib/gitlab/request_context_spec.rb

@@ -24,18 +24,6 @@ describe Gitlab::RequestContext, :request_store do
 
       expect(subject.request_deadline).to be_nil
     end
-
-    it 'only checks the feature once per request-instance' do
-      expect(Feature).to receive(:enabled?).with(:request_deadline).once
-
-      2.times { subject.request_deadline }
-    end
-
-    it 'returns nil when the feature is disabled' do
-      stub_feature_flags(request_deadline: false)
-
-      expect(subject.request_deadline).to be_nil
-    end
   end
 
   describe '#ensure_request_deadline_not_exceeded!' do