Remove SIGFILEBALL after creating sig
Remove SIGFILEBALL after creating sig

lmcro/letsencrypt,wteiken/letsencrypt,brentdax/letsencrypt,jtl999/certbot,stweil/letsencrypt,letsencrypt/letsencrypt,mitnk/letsencrypt,bsmr-misc-forks/letsencrypt,bsmr-misc-forks/letsencrypt,mitnk/letsencrypt,DavidGarciaCat/letsencrypt,stweil/letsencrypt,dietsche/letsencrypt,brentdax/letsencrypt,jsha/letsencrypt,DavidGarciaCat/letsencrypt,jtl999/certbot,wteiken/letsencrypt,letsencrypt/letsencrypt,lmcro/letsencrypt,jsha/letsencrypt,dietsche/letsencrypt