Remove const to respect style
Remove const to respect style

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