Reverts "Ensure the identity name is the same for C# and VB templates (#946)" (#993)

This reverts commit cf0bed3.

Fixes ‘Dotnet new‘ shows WPF template for VB only #987

Author: vatsan-madhavan

packaging/Microsoft.Dotnet.Wpf.ProjectTemplates/content/WpfApplication-VisualBasic/.template.config/template.json

@@ -7,7 +7,7 @@
   "description": "A project for creating a .NET Core WPF Application",
   "groupIdentity": "Microsoft.Common.WPF",
   "precedence": "3000",
-  "identity": "Microsoft.Common.WPF",
+  "identity": "Microsoft.Common.WPF.VisualBasic.3.0",
   "shortName": "wpf",
   "tags": {
     "language": "VB",