Remove catfile cache feature flag

changelogs/unreleased/jc-remove-catfile-flag.yml

+---
+title: Remove catfile cache feature flag
+merge_request: 30750
+author:
+type: performance

lib/feature/gitaly.rb

@@ -5,16 +5,12 @@ require 'set'
 class Feature
   class Gitaly
     # Server feature flags should use '_' to separate words.
-    # CATFILE_CACHE sets an incorrect example
-    CATFILE_CACHE = 'catfile-cache'.freeze
-
     SERVER_FEATURE_FLAGS =
       [
-        CATFILE_CACHE,
         'get_commit_signatures'.freeze
       ].freeze
 
-    DEFAULT_ON_FLAGS = Set.new([CATFILE_CACHE]).freeze
+    DEFAULT_ON_FLAGS = Set.new([]).freeze
 
     class << self
       def enabled?(feature_flag)

lib/gitlab/gitaly_client.rb

@@ -211,8 +211,7 @@ module Gitlab
       metadata['call_site'] = feature.to_s if feature
       metadata['gitaly-servers'] = address_metadata(remote_storage) if remote_storage
       metadata['x-gitlab-correlation-id'] = Labkit::Correlation::CorrelationId.current_id if Labkit::Correlation::CorrelationId.current_id
-      metadata['gitaly-session-id'] = session_id if Feature::Gitaly.enabled?(Feature::Gitaly::CATFILE_CACHE)
-
+      metadata['gitaly-session-id'] = session_id
       metadata.merge!(Feature::Gitaly.server_feature_flags)
 
       result = { metadata: metadata }

spec/lib/gitlab/gitaly_client_spec.rb

@@ -171,17 +171,6 @@ describe Gitlab::GitalyClient do
         end
       end
     end
-
-    context 'when catfile-cache feature is disabled' do
-      before do
-        stub_feature_flags({ 'gitaly_catfile-cache': false })
-      end
-
-      it 'does not set the gitaly-session-id in the metadata' do
-        results = described_class.request_kwargs('default', nil)
-        expect(results[:metadata]).not_to include('gitaly-session-id')
-      end
-    end
   end
 
   describe 'enforce_gitaly_request_limits?' do