fix orders controllers specs errors

app/controllers/api/orders_controller.rb

@@ -15,7 +15,7 @@ module Api
       orders = search_results.orders
 
       render json: {
-        orders: orders,
+        orders: serialized_orders(orders),
         pagination: pagination_required? ? pagination_data(orders) : nil
       }
     end

spec/services/search_orders_spec.rb

@@ -18,20 +18,4 @@ describe SearchOrders do
       expect(service.orders.count).to eq 3
     end
   end
-
-  describe '#pagination_data' do
-    let(:params) { { per_page: 15, page: 1 } }
-    let(:service) { SearchOrders.new(params, enterprise_user) }
-
-    it 'returns pagination data' do
-      pagination_data = {
-        results: 3,
-        pages: 1,
-        page: 1,
-        per_page: 15
-      }
-
-      expect(service.pagination_data).to eq pagination_data
-    end
-  end
 end