Remove unncessary unpack
Remove unncessary unpack

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