Remove empty sidecar folder
Remove empty sidecar folder

poire-z/koreader,Hzj-jie/koreader,koreader/koreader,Frenzie/koreader,mihailim/koreader,lgeek/koreader,poire-z/koreader,Markismus/koreader,pazos/koreader,houqp/koreader,NiLuJe/koreader,NiLuJe/koreader,robert00s/koreader,apletnev/koreader,koreader/koreader,Frenzie/koreader,mwoz123/koreader