Remove remaining calls to CI yaml in pipeline specs

spec/services/ci/process_pipeline_service_spec.rb

@@ -3,11 +3,6 @@ require 'spec_helper'
 describe Ci::ProcessPipelineService, services: true do
   let(:pipeline) { create(:ci_pipeline, ref: 'master') }
   let(:user) { create(:user) }
-  let(:config) { nil }
-
-  before do
-    allow(pipeline).to receive(:ci_yaml_file).and_return(config)
-  end
 
   describe '#execute' do
     context 'start queuing next builds' do