remove some more redundant stuff
remove some more redundant stuff

Karankang007/angular-viewport-watch,shahata/angular-viewport-watch,shahata/angular-viewport-watch,lATAl/angular-viewport-watch,Karankang007/angular-viewport-watch,shahata/angular-viewport-watch,Karankang007/angular-viewport-watch,lATAl/angular-viewport-watch,lATAl/angular-viewport-watch