Get faster hang results

Author: javiercn

.azure/pipelines/jobs/default-build.yml

@@ -58,7 +58,7 @@ parameters:
   installTar: true
   installNodeJs: true
   installJdk: true
-  timeoutInMinutes: 180
+  timeoutInMinutes: 30
 
   # We need longer than the default amount of 5 minutes to upload our logs/artifacts. (We currently take around 5 mins in the best case).
   # This makes sure we have time to upload everything in the case of a build timeout - really important for investigating a build
@@ -130,7 +130,7 @@ jobs:
     - ${{ if and(eq(parameters.agentOs, 'Windows'), eq(parameters.isTestingJob, true)) }}:
       - powershell: ./eng/scripts/InstallProcDump.ps1
         displayName: Install ProcDump
-      - powershell: ./eng/scripts/StartDumpCollectionForHangingBuilds.ps1 $(ProcDumpPath)procdump.exe artifacts/dumps/ (Get-Date).AddMinutes(160) dotnet
+      - powershell: ./eng/scripts/StartDumpCollectionForHangingBuilds.ps1 $(ProcDumpPath)procdump.exe artifacts/dumps/ (Get-Date).AddMinutes(20) dotnet
         displayName: Start background dump collection
     - ${{ if eq(parameters.installNodeJs, 'true') }}:
       - task: NodeTool@0

src/Shared/E2ETesting/BrowserTestBase.cs

@@ -1,16 +1,11 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using OpenQA.Selenium;
-using OpenQA.Selenium.Support.UI;
 using Xunit;
 using Xunit.Abstractions;
-using Xunit.Sdk;
 
 namespace Microsoft.AspNetCore.E2ETesting
 {