Add untyped for deleteField

std/cpp/_std/Reflect.hx

@@ -78,7 +78,7 @@
 
 	public static function deleteField( o : Dynamic, f : String ) : Bool untyped {
 		if (o==null) return false;
-		return __global__.__hxcpp_anon_remove(o,f);
+		return untyped __global__.__hxcpp_anon_remove(o,f);
 	}
 
 	public static function copy<T>( o : T ) : T {