Remove unnecessary argument
Remove unnecessary argument

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