Delete kaldi_feat_io.py
Delete kaldi_feat_io.py

delete kaldi_feat_io.py because it is a duplicate of kaldi_feat.py
mclaughlin6464/pdnn,yajiemiao/pdnn,ZenDevelopmentSystems/pdnn,mclaughlin6464/pdnn,ZenDevelopmentSystems/pdnn,yajiemiao/pdnn