Remove unused `BuildProcessWorker`

We migrated all logic to `PipelineProcessWorker`
and this worker become redundant.

app/workers/all_queues.yml

@@ -88,7 +88,6 @@
 - pipeline_processing:ci_build_prepare
 - pipeline_processing:build_queue
 - pipeline_processing:build_success
-- pipeline_processing:build_process
 - pipeline_processing:pipeline_process
 - pipeline_processing:pipeline_success
 - pipeline_processing:pipeline_update

app/workers/build_process_worker.rb

-# frozen_string_literal: true
-
-class BuildProcessWorker
-  include ApplicationWorker
-  include PipelineQueue
-
-  queue_namespace :pipeline_processing
-
-  # rubocop: disable CodeReuse/ActiveRecord
-  def perform(build_id)
-    CommitStatus.find_by(id: build_id).try do |build|
-      build.pipeline.process!([build_id])
-    end
-  end
-  # rubocop: enable CodeReuse/ActiveRecord
-end

spec/workers/build_process_worker_spec.rb

-# frozen_string_literal: true
-
-require 'spec_helper'
-
-describe BuildProcessWorker do
-  describe '#perform' do
-    context 'when build exists' do
-      let(:pipeline) { create(:ci_pipeline) }
-      let(:build) { create(:ci_build, pipeline: pipeline) }
-
-      it 'processes build' do
-        expect_any_instance_of(Ci::Pipeline).to receive(:process!)
-          .with([build.id])
-
-        described_class.new.perform(build.id)
-      end
-    end
-
-    context 'when build does not exist' do
-      it 'does not raise exception' do
-        expect { described_class.new.perform(123) }
-          .not_to raise_error
-      end
-    end
-  end
-end