Remove invoke_before_training argument
Remove invoke_before_training argument

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