Remove documents of deprecated functions
Remove documents of deprecated functions

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