Removed .Debugging namespace.

Author: rkeithhill

src/PowerShellEditorServices/Debugging/DebugService.cs

@@ -9,7 +9,6 @@
 using System.Linq;
 using System.Management.Automation;
 using System.Threading.Tasks;
-using Microsoft.PowerShell.EditorServices.Debugging;
 
 namespace Microsoft.PowerShell.EditorServices
 {

src/PowerShellEditorServices/Debugging/StackFrameDetails.cs

@@ -3,9 +3,7 @@
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 //
 
-using System.Collections.Generic;
 using System.Management.Automation;
-using Microsoft.PowerShell.EditorServices.Debugging;
 
 namespace Microsoft.PowerShell.EditorServices
 {

src/PowerShellEditorServices/Debugging/VariableContainerDetails.cs

@@ -7,7 +7,7 @@
 using System.Diagnostics;
 using Microsoft.PowerShell.EditorServices.Utility;
 
-namespace Microsoft.PowerShell.EditorServices.Debugging
+namespace Microsoft.PowerShell.EditorServices
 {
     /// <summary>
     /// Container for variables that is not itself a variable per se.  However given how