Update CookieStickySessions.cs

Remove and Sort Usings

Author: raman-m

src/Ocelot/LoadBalancer/LoadBalancers/CookieStickySessions.cs

@@ -1,14 +1,10 @@
-using System;
-using System.Collections.Concurrent;
-using System.Threading.Tasks;
-
-using Ocelot.Infrastructure;
-
 using Microsoft.AspNetCore.Http;
-
+using Ocelot.Infrastructure;
 using Ocelot.Responses;
-
 using Ocelot.Values;
+using System;
+using System.Collections.Concurrent;
+using System.Threading.Tasks;
 
 namespace Ocelot.LoadBalancer.LoadBalancers
 {