Simplify code
Simplify code

niboshi/chainer,keisuke-umezawa/chainer,niboshi/chainer,ktnyt/chainer,kashif/chainer,niboshi/chainer,niboshi/chainer,keisuke-umezawa/chainer,keisuke-umezawa/chainer,okuta/chainer,jnishi/chainer,chainer/chainer,hvy/chainer,cupy/cupy,chainer/chainer,jnishi/chainer,wkentaro/chainer,hvy/chainer,chainer/chainer,cupy/cupy,wkentaro/chainer,cupy/cupy,okuta/chainer,okuta/chainer,hvy/chainer,tkerola/chainer,delta2323/chainer,pfnet/chainer,ronekko/chainer,jnishi/chainer,okuta/chainer,rezoo/chainer,ysekky/chainer,ktnyt/chainer,kiyukuta/chainer,cupy/cupy,chainer/chainer,jnishi/chainer,wkentaro/chainer,ktnyt/chainer,keisuke-umezawa/chainer,wkentaro/chainer,aonotas/chainer,hvy/chainer,anaruse/chainer,ktnyt/chainer