Remove legacy methods of ci pipeline

These methods are not used anymore after deleting legacy pipeline
processing.

They are replaced by Ci::ProcessPipelineService

app/models/ci/pipeline.rb

@@ -733,10 +733,6 @@ module Ci
       end
     end
 
-    def update_legacy_status
-      set_status(latest_builds_status.to_s)
-    end
-
     def protected_ref?
       strong_memoize(:protected_ref) { project.protected_for?(git_ref) }
     end
@@ -1089,12 +1085,6 @@ module Ci
       end
     end
 
-    def latest_builds_status
-      return 'failed' unless yaml_errors.blank?
-
-      statuses.latest.slow_composite_status(project: project) || 'skipped'
-    end
-
     def keep_around_commits
       return unless project
 

db/fixtures/development/14_pipelines.rb

@@ -57,7 +57,7 @@ class Gitlab::Seeder::Pipelines
       BUILDS.each { |opts| build_create!(pipeline, opts) }
       EXTERNAL_JOBS.each { |opts| commit_status_create!(pipeline, opts) }
       pipeline.update_duration
-      pipeline.update_legacy_status
+      ::Ci::ProcessPipelineService.new(pipeline).execute
     end
   end
 

spec/features/projects/badges/coverage_spec.rb

@@ -63,7 +63,7 @@ RSpec.describe 'test coverage badge' do
 
     create(:ci_pipeline, opts).tap do |pipeline|
       yield pipeline
-      pipeline.update_legacy_status
+      ::Ci::ProcessPipelineService.new(pipeline).execute
     end
   end
 

spec/lib/gitlab/badge/coverage/report_spec.rb

@@ -102,7 +102,7 @@ RSpec.describe Gitlab::Badge::Coverage::Report do
 
     create(:ci_pipeline, opts).tap do |pipeline|
       yield pipeline
-      pipeline.update_legacy_status
+      ::Ci::ProcessPipelineService.new(pipeline).execute
     end
   end
 end

spec/models/ci/pipeline_spec.rb

@@ -2096,58 +2096,6 @@ RSpec.describe Ci::Pipeline, :mailer do
     end
   end
 
-  describe '#update_status' do
-    context 'when pipeline is empty' do
-      it 'updates does not change pipeline status' do
-        expect(pipeline.statuses.latest.slow_composite_status(project: project)).to be_nil
-
-        expect { pipeline.update_legacy_status }
-          .to change { pipeline.reload.status }
-          .from('created')
-          .to('skipped')
-      end
-    end
-
-    context 'when updating status to pending' do
-      before do
-        create(:ci_build, pipeline: pipeline, status: :running)
-      end
-
-      it 'updates pipeline status to running' do
-        expect { pipeline.update_legacy_status }
-          .to change { pipeline.reload.status }
-          .from('created')
-          .to('running')
-      end
-    end
-
-    context 'when updating status to scheduled' do
-      before do
-        create(:ci_build, pipeline: pipeline, status: :scheduled)
-      end
-
-      it 'updates pipeline status to scheduled' do
-        expect { pipeline.update_legacy_status }
-          .to change { pipeline.reload.status }
-          .from('created')
-          .to('scheduled')
-      end
-    end
-
-    context 'when statuses status was not recognized' do
-      before do
-        allow(pipeline)
-          .to receive(:latest_builds_status)
-          .and_return(:unknown)
-      end
-
-      it 'raises an exception' do
-        expect { pipeline.update_legacy_status }
-          .to raise_error(Ci::HasStatus::UnknownStatusError)
-      end
-    end
-  end
-
   describe '#detailed_status' do
     subject { pipeline.detailed_status(user) }
 

spec/services/ci/retry_pipeline_service_spec.rb

@@ -364,7 +364,7 @@ RSpec.describe Ci::RetryPipelineService, '#execute' do
                       stage: "stage_#{stage_num}",
                       stage_idx: stage_num,
                       pipeline: pipeline, **opts) do |build|
-      pipeline.update_legacy_status
+      ::Ci::ProcessPipelineService.new(pipeline).execute
     end
   end
 end