Remove superfluous networkActivityIndicator setters.
Remove superfluous networkActivityIndicator setters.

Kingside/SVWebViewController,TransitApp/SVWebViewController,hoowang/SVWebViewController,Gaoxian/SVWebViewController,adonoho/SVWebViewController,inbilin-inc/SVWebViewController,mohsinalimat/SVWebViewController,HarrisLee/SVWebViewController,ch-beck/SVWebViewController,1yvT0s/SVWebViewController,keslcod/SVWebViewController,9gag-open-source/SVWebViewController,hoanganh6491/SVWebViewController,rtsbtx/SVWebViewController,jianwoo/SVWebViewController,bouralu89/SVWebViewController,benzhipeng/SVWebViewController