Remove feature flag from project registry model

ee/app/models/geo/project_registry.rb

@@ -43,10 +43,6 @@ class Geo::ProjectRegistry < Geo::BaseRegistry
     where(nil).pluck(:project_id)
   end
 
-  def self.registry_consistency_worker_enabled?
-    Feature.enabled?(:geo_project_registry_ssot_sync, default_enabled: true)
-  end
-
   def self.find_registry_differences(range)
     source_ids = Gitlab::Geo.current_node.projects.id_in(range).pluck_primary_key
     tracked_ids = self.pluck_model_ids_in_range(range)

ee/spec/workers/geo/secondary/registry_consistency_worker_spec.rb

@@ -101,28 +101,6 @@ RSpec.describe Geo::Secondary::RegistryConsistencyWorker, :geo, :geo_fdw do
       expect(Geo::PackageFileRegistry.where(package_file_id: package_file.id).count).to eq(1)
     end
 
-    context 'when geo_project_registry_ssot_sync is disabled' do
-      before do
-        stub_feature_flags(geo_project_registry_ssot_sync: false)
-      end
-
-      it 'returns false' do
-        expect(subject.perform).to be_falsey
-      end
-
-      it 'does not execute RegistryConsistencyService for projects' do
-        allow(Geo::RegistryConsistencyService).to receive(:new).with(Geo::JobArtifactRegistry, batch_size: batch_size).and_call_original
-        allow(Geo::RegistryConsistencyService).to receive(:new).with(Geo::LfsObjectRegistry, batch_size: batch_size).and_call_original
-        allow(Geo::RegistryConsistencyService).to receive(:new).with(Geo::PackageFileRegistry, batch_size: batch_size).and_call_original
-        allow(Geo::RegistryConsistencyService).to receive(:new).with(Geo::UploadRegistry, batch_size: batch_size).and_call_original
-        allow(Geo::RegistryConsistencyService).to receive(:new).with(Geo::DesignRegistry, batch_size: batch_size).and_call_original
-
-        expect(Geo::RegistryConsistencyService).not_to receive(:new).with(Geo::ProjectRegistry, batch_size: batch_size)
-
-        subject.perform
-      end
-    end
-
     context 'when geo_design_registry_ssot_sync is disabled' do
       before do
         stub_feature_flags(geo_design_registry_ssot_sync: false)