Remove CoreConsoleHost from xUnit tests

test/csharp/fixture_AssemblyLoadContext.cs

@@ -1,7 +1,6 @@
 using Xunit;
 using System;
 using System.Management.Automation;
-using Microsoft.PowerShell.CoreConsoleHost;
 
 // This collection fixture initializes Core PowerShell's AssemblyLoadContext once and only
 // once. Attempting to initialize in a class level fixture will cause multiple

test/csharp/test_FileSystemProvider.cs

@@ -13,7 +13,6 @@ using System.Management.Automation.Provider;
 using System.Management.Automation.Runspaces;
 using Microsoft.PowerShell;
 using Microsoft.PowerShell.Commands;
-using Microsoft.PowerShell.CoreConsoleHost;
 
 namespace PSTests
 {

test/csharp/test_Runspace.cs

@@ -2,7 +2,6 @@ using Xunit;
 using System;
 using System.Management.Automation;
 using System.Management.Automation.Runspaces;
-using Microsoft.PowerShell.CoreConsoleHost;
 
 namespace PSTests
 {

test/csharp/test_SessionState.cs

@@ -9,7 +9,6 @@ using System.Management.Automation.Internal;
 using System.Management.Automation.Internal.Host;
 using System.Management.Automation.Runspaces;
 using Microsoft.PowerShell;
-using Microsoft.PowerShell.CoreConsoleHost;
 
 namespace PSTests
 {