remove un wanted using

Author: abuzuhri

Source/FikaAmazonAPI.SampleCode/ProductPricingSample.cs

@@ -1,10 +1,5 @@
 using FikaAmazonAPI.Parameter.ProductPricing;
 using FikaAmazonAPI.Utils;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using static FikaAmazonAPI.Utils.Constants;
 
 namespace FikaAmazonAPI.SampleCode
@@ -88,7 +83,7 @@ public async Task GetItemOffersBatch()
             });
 
             ;
-            
+
         }