remove un-used util functions
remove un-used util functions

keenwon/connect,RickyDan/connect,austincitylimits/connect,llwanghong/connect,liuwei9413/connect,gtomitsuka/connect,dkfiresky/connect,mi2oon/connect,behind2/connect,lian774739140/connect,RoseTHERESA/connect,mi2oon/connect,wghust/connect,khirayama/connect,senchalabs/connect,chinazhaghai/connect,tanveer12332/connect,qitianchan/connect,khalerc/connect