Remove unused method in BuildingBlock under resnet.py
Remove unused method in BuildingBlock under resnet.py

keisuke-umezawa/chainer,ktnyt/chainer,chainer/chainer,wkentaro/chainer,jnishi/chainer,jnishi/chainer,niboshi/chainer,keisuke-umezawa/chainer,hvy/chainer,jnishi/chainer,chainer/chainer,hvy/chainer,okuta/chainer,tkerola/chainer,niboshi/chainer,ktnyt/chainer,wkentaro/chainer,jnishi/chainer,hvy/chainer,niboshi/chainer,keisuke-umezawa/chainer,wkentaro/chainer,wkentaro/chainer,pfnet/chainer,okuta/chainer,hvy/chainer,chainer/chainer,chainer/chainer,okuta/chainer,okuta/chainer,ktnyt/chainer,ktnyt/chainer,keisuke-umezawa/chainer,rezoo/chainer,niboshi/chainer,ronekko/chainer