Remove unused TSAB.AddTypeReferenceAnnotations

ICSharpCode.Decompiler/CSharp/OutputVisitor/CSharpAmbience.cs

@@ -191,7 +191,6 @@ namespace ICSharpCode.Decompiler.CSharp.OutputVisitor
 		TypeSystemAstBuilder CreateAstBuilder()
 		{
 			TypeSystemAstBuilder astBuilder = new TypeSystemAstBuilder();
-			astBuilder.AddTypeReferenceAnnotations = true;
 			astBuilder.AddResolveResultAnnotations = true;
 			astBuilder.ShowTypeParametersForUnboundTypes = true;
 			astBuilder.ShowModifiers = (ConversionFlags & ConversionFlags.ShowModifiers) == ConversionFlags.ShowModifiers;

ICSharpCode.Decompiler/CSharp/Syntax/TypeSystemAstBuilder.cs

@@ -212,8 +212,6 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 
 		private void AddTypeAnnotation(AstType astType, IType type)
 		{
-			if (AddTypeReferenceAnnotations)
-				astType.AddAnnotation(type);
 			if (AddResolveResultAnnotations)
 				astType.AddAnnotation(new TypeResolveResult(type));
 		}