Remove paths from BuildArtifactEntity

- Remove feature flag and use new behavior with fewer fields
- Remove specs asserting both flag behaviors

app/serializers/build_artifact_entity.rb

@@ -21,20 +21,8 @@ class BuildArtifactEntity < Grape::Entity
     )
   end
 
-  expose :keep_path, if: -> (*) { artifact.expiring? && show_duplicated_paths?(project) } do |artifact|
-    fast_keep_project_job_artifacts_path(project, artifact.job)
-  end
-
-  expose :browse_path, if: -> (*) { show_duplicated_paths?(project) } do |artifact|
-    fast_browse_project_job_artifacts_path(project, artifact.job)
-  end
-
   private
 
-  def show_duplicated_paths?(project)
-    !Gitlab::Ci::Features.remove_duplicate_artifact_exposure_paths?(project)
-  end
-
   def project
     options[:project] || artifact.project
   end

changelogs/unreleased/dc-remove-artifact-fields-feature-flag.yml

+---
+title: Remove paths from BuildArtifactEntity
+merge_request: 58818
+author:
+type: performance

config/feature_flags/development/remove_duplicate_artifact_exposure_paths.yml

----
-name: remove_duplicate_artifact_exposure_paths
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/54611
-rollout_issue_url:
-milestone: '13.10'
-type: development
-group: group::testing
-default_enabled: false

lib/gitlab/ci/features.rb

@@ -63,10 +63,6 @@ module Gitlab
       def self.multiple_cache_per_job?
         ::Feature.enabled?(:multiple_cache_per_job, default_enabled: :yaml)
       end
-
-      def self.remove_duplicate_artifact_exposure_paths?(project)
-        ::Feature.enabled?(:remove_duplicate_artifact_exposure_paths, project, default_enabled: :yaml)
-      end
     end
   end
 end

spec/serializers/build_artifact_entity_spec.rb

@@ -27,28 +27,6 @@ RSpec.describe BuildArtifactEntity do
       expect(subject[:path]).to include "jobs/#{job.id}/artifacts/download?file_type=codequality"
     end
 
-    context 'with remove_duplicate_artifact_exposure_paths enabled' do
-      before do
-        stub_feature_flags(remove_duplicate_artifact_exposure_paths: true)
-      end
-
-      it 'has no keep or browse path' do
-        expect(subject).not_to include(:keep_path)
-        expect(subject).not_to include(:browse_path)
-      end
-    end
-
-    context 'with remove_duplicate_artifact_exposure_paths disabled' do
-      before do
-        stub_feature_flags(remove_duplicate_artifact_exposure_paths: false)
-      end
-
-      it 'has keep and browse paths' do
-        expect(subject[:keep_path]).to be_present
-        expect(subject[:browse_path]).to be_present
-      end
-    end
-
     context 'when project is specified in options' do
       let(:options) { super().merge(project: job.project) }