Removed some unnecessary demo code.
Removed some unnecessary demo code.

wayne798/PKRevealController,BlessNeo/PKRevealController,wpostma/PKRevealControllerWP,xiaotaijun/PKRevealController,wjszf/PKRevealController,emodeqidao/PKRevealController,leasual/PKRevealController,adonoho/PKRevealController,pengleelove/PKRevealController,nitxc/PKRevealController,andyFang1688/PKRevealController,pkluz/PKRevealController,adonoho/PKRevealController,adonoho/PKRevealController,duanhjlt/PKRevealController,RyanTech/PKRevealController,chengkaizone/PKRevealController,hanangellove/PKRevealController,wubangjunjava/PKRevealController,SanChain/PKRevealController,xingyuniu/PKRevealController,policp/PKRevealController,libiao88/PKRevealController,cnbin/PKRevealController,chieryw/PKRevealController,SummerHF/PKRevealController,AbooJan/PKRevealController,SuPair/PKRevealController,ramoslin02/PKRevealController,AlanJN/PKRevealController