Cleanup lib/generators/json.js
Cleanup lib/generators/json.js

tshoper/gitbook,gencer/gitbook,ryanswanson/gitbook,strawluffy/gitbook,GitbookIO/gitbook,athiruban/gitbook,sunlianghua/gitbook,athiruban/gitbook,tshoper/gitbook,gencer/gitbook,sunlianghua/gitbook