Remove a unneeded using statement

Author: bclothier

Rubberduck.Core/App.cs

@@ -13,7 +13,6 @@
 using Rubberduck.Parsing.Inspections.Resources;
 using Rubberduck.Parsing.UIContext;
 using Rubberduck.UI.Command;
-using Rubberduck.VBEditor.ComManagement;
 using Rubberduck.VBEditor.SafeComWrappers.Abstract;
 using Rubberduck.VBEditor.Utility;
 using Rubberduck.VersionCheck;