remove unnecessary DEBUG
remove unnecessary DEBUG

pazos/koreader,mihailim/koreader,lgeek/koreader,mwoz123/koreader,Hzj-jie/koreader,robert00s/koreader,houqp/koreader,Frenzie/koreader,frankyifei/koreader,koreader/koreader,Markismus/koreader,poire-z/koreader,noname007/koreader,apletnev/koreader,NickSavage/koreader,ashhher3/koreader,NiLuJe/koreader,chrox/koreader,koreader/koreader,chihyang/koreader,Frenzie/koreader,NiLuJe/koreader,ashang/koreader,poire-z/koreader