[datasets] removed the direct import of MultiPIEDataset, since it depends on bob.db.multipie

bob/learn/pytorch/datasets/__init__.py

 from .casia_webface import CasiaDataset
 from .casia_webface import CasiaWebFaceDataset
 
-from .multipie import MultiPIEDataset
-
 # transforms
 from .utils import FaceCropper
 from .utils import RollChannels