Simplify code
Simplify code

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