fix importlib.machinery issue on github's autotests #yolo

def mute_sdxl_imports():

    """create fake modules that SDXL wants to import but doesn't actually use for our purposes"""

    import importlib

    class Dummy:

        pass

    module = importlib.util.module_from_spec(importlib.machinery.ModuleSpec('taming.modules.losses.lpips', None))

    module = Dummy()

    module.LPIPS = None

    sys.modules['taming.modules.losses.lpips'] = module

    module = importlib.util.module_from_spec(importlib.machinery.ModuleSpec('sgm.data', None))

    module = Dummy()

    module.StableDataModuleFromConfig = None

    sys.modules['sgm.data'] = module