Remove test using mixed volatility
Remove test using mixed volatility

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