dropbox: remove unused code
dropbox: remove unused code

seuffert/rclone,olihey/rclone,seuffert/rclone,B4dM4n/rclone,ncw/rclone,seuffert/rclone,olihey/rclone,olihey/rclone,yonjah/rclone,yonjah/rclone,ncw/rclone,seuffert/rclone,yonjah/rclone,olihey/rclone,B4dM4n/rclone,yonjah/rclone,ncw/rclone,B4dM4n/rclone,ncw/rclone,B4dM4n/rclone