remove a few jshint warnings
remove a few jshint warnings

CyrusBiotechnology/pv,biasmv/pv,Traksewt/pv,Traksewt/pv,biasmv/pv,yuhangwang/pv,yuhangwang/pv,yuhangwang/pv,CyrusBiotechnology/pv,biasmv/pv,yuhangwang/pv,Traksewt/pv,biasmv/pv,CyrusBiotechnology/pv,CyrusBiotechnology/pv,Traksewt/pv