remove simple_op_design.md
remove simple_op_design.md

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