remove unneeded usings

Author: JoshLozensky

UiTests/HybridFlowUiTest/HybridFlowTest.cs

@@ -1,20 +1,17 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
+using Common;
+using Microsoft.Identity.Lab.Api;
+using Microsoft.Playwright;
 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.Linq;
-using System.Net;
 using System.Runtime.Versioning;
 using System.Text;
 using System.Threading.Tasks;
-using Common;
-using Microsoft.Identity.Lab.Api;
-using Microsoft.Playwright;
 using Xunit;
 using Xunit.Abstractions;
-using static System.Net.Mime.MediaTypeNames;
 using Process = System.Diagnostics.Process;
 using TC = Common.TestConstants;