remove unused code
remove unused code

raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth,raydeng83/growth