No double calls will be made

Do not call load_upscalers in list_builtin_upscalers

modules/modelloader.py

@@ -133,12 +133,9 @@ forbidden_upscaler_classes = set()
 
 
 def list_builtin_upscalers():
-    load_upscalers()
-
     builtin_upscaler_classes.clear()
     builtin_upscaler_classes.extend(Upscaler.__subclasses__())
 
-
 def forbid_loaded_nonbuiltin_upscalers():
     for cls in Upscaler.__subclasses__():
         if cls not in builtin_upscaler_classes: