remove device_context deps in memcpy
remove device_context deps in memcpy

pengli09/Paddle,QiJune/Paddle,chengduoZH/Paddle,lispc/Paddle,luotao1/Paddle,jacquesqiao/Paddle,hedaoyuan/Paddle,pengli09/Paddle,pkuyym/Paddle,pkuyym/Paddle,Canpio/Paddle,hedaoyuan/Paddle,lispc/Paddle,putcn/Paddle,PaddlePaddle/Paddle,lcy-seso/Paddle,QiJune/Paddle,reyoung/Paddle,reyoung/Paddle,reyoung/Paddle,lispc/Paddle,jacquesqiao/Paddle,tensor-tang/Paddle,pengli09/Paddle,QiJune/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,lcy-seso/Paddle,pkuyym/Paddle,chengduoZH/Paddle,putcn/Paddle,yu239/Paddle,yu239/Paddle,Canpio/Paddle,jacquesqiao/Paddle,QiJune/Paddle,QiJune/Paddle,baidu/Paddle,putcn/Paddle,baidu/Paddle,luotao1/Paddle,yu239/Paddle,lispc/Paddle,Canpio/Paddle,lispc/Paddle,hedaoyuan/Paddle,lispc/Paddle,pengli09/Paddle,hedaoyuan/Paddle,luotao1/Paddle,reyoung/Paddle,Canpio/Paddle,luotao1/Paddle,Canpio/Paddle,Canpio/Paddle,lcy-seso/Paddle,putcn/Paddle,lcy-seso/Paddle,reyoung/Paddle,pengli09/Paddle,lcy-seso/Paddle,tensor-tang/Paddle,chengduoZH/Paddle,yu239/Paddle,baidu/Paddle,Canpio/Paddle,putcn/Paddle,chengduoZH/Paddle,tensor-tang/Paddle,luotao1/Paddle,hedaoyuan/Paddle,hedaoyuan/Paddle,QiJune/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,baidu/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,pkuyym/Paddle,pengli09/Paddle,hedaoyuan/Paddle,jacquesqiao/Paddle,PaddlePaddle/Paddle,putcn/Paddle,lcy-seso/Paddle,chengduoZH/Paddle,jacquesqiao/Paddle,tensor-tang/Paddle,pengli09/Paddle,lispc/Paddle,baidu/Paddle,luotao1/Paddle,yu239/Paddle,tensor-tang/Paddle,pkuyym/Paddle,jacquesqiao/Paddle,yu239/Paddle,yu239/Paddle,Canpio/Paddle,pkuyym/Paddle,pengli09/Paddle,yu239/Paddle,reyoung/Paddle,hedaoyuan/Paddle,lispc/Paddle