Remove unnecessary noconvert()
Remove unnecessary noconvert()

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