Revert adding shared examples for every sidekiq worker

Since this already exists in `every_sidekiq_worker_spec.rb`.

spec/support/shared_examples/sidekiq_worker_shared_examples.rb

-shared_examples 'sidekiq worker' do
-  let(:queues) do
-    YAML.load_file(Rails.root.join('config', 'sidekiq_queues.yml'))
-      .fetch(:queues, []).map(&:first)
-  end
-
-  it 'is going to be processed inside a known sidekiq queue' do
-    expect(described_class.sidekiq_options['queue'].to_s).to be_in queues
-  end
-end

spec/workers/authorized_projects_worker_spec.rb

@@ -47,6 +47,4 @@
       end
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/background_migration_worker_spec.rb

@@ -41,6 +41,4 @@
       end
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/build_coverage_worker_spec.rb

@@ -20,6 +20,4 @@
       end
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/build_finished_worker_spec.rb

@@ -27,6 +27,4 @@
       end
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/build_hooks_worker_spec.rb

@@ -20,6 +20,4 @@
       end
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/build_success_worker_spec.rb

@@ -33,6 +33,4 @@
       end
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/create_gpg_signature_worker_spec.rb

@@ -36,6 +36,4 @@
       described_class.new.perform(anything, nonexisting_project_id)
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/delete_merged_branches_worker_spec.rb

@@ -16,6 +16,4 @@
       expect(worker.perform('unknown', project.owner.id)).to be_falsy
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/delete_user_worker_spec.rb

@@ -17,6 +17,4 @@
     described_class.new.perform(current_user.id, user.id, "test" => "test")
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/email_receiver_worker_spec.rb

@@ -60,6 +60,4 @@
       described_class.new.perform(raw_message)
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/emails_on_push_worker_spec.rb

@@ -127,6 +127,4 @@
       end
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/every_sidekiq_worker_spec.rb

@@ -41,6 +41,4 @@
       expect(queue_names).to include(worker.sidekiq_options['queue'].to_s)
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/expire_build_artifacts_worker_spec.rb

@@ -47,6 +47,4 @@ def jobs_enqueued
       Sidekiq::Queues.jobs_by_worker['ExpireBuildInstanceArtifactsWorker']
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/expire_build_instance_artifacts_worker_spec.rb

@@ -74,6 +74,4 @@
       end
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/expire_job_cache_worker_spec.rb

@@ -28,6 +28,4 @@
       end
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/expire_pipeline_cache_worker_spec.rb

@@ -43,6 +43,4 @@
       subject.perform(pipeline.id)
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/git_garbage_collect_worker_spec.rb

@@ -131,8 +131,6 @@
     end
   end
-  it_behaves_like 'sidekiq worker'
-
   # Create a new commit on a random new branch
   def create_objects(project)
     rugged = project.repository.rugged

spec/workers/gitlab_usage_ping_worker_spec.rb

@@ -10,6 +10,4 @@
     subject.perform
   end
-
-  it_behaves_like 'sidekiq worker'
 end

spec/workers/group_destroy_worker_spec.rb

@@ -16,6 +16,4 @@
       expect(Dir.exist?(project.path)).to be_falsey
     end
   end
-
-  it_behaves_like 'sidekiq worker'
 end