Creo ModelCHECK > start_config_options > Unwanted Layers for ModelUPDATE
  
Unwanted Layers for ModelUPDATE
You can specify the names of unwanted layers. ModelUPDATE removes the unwanted layers if configured to do so in the LAYER_UNWANTED check. Use the following format in the start configuration file:
PRT_LAYER_UNWANTED [layer]
ASM_LAYER_UNWANTED [layer]
DRW_LAYER_UNWANTED [layer]