Revert "* [ios] fix : if _fontFamily is nil set _fontFamily value with the correct system font. In the case of Chinese characters, this logic help system select the right system default font name."
Revert "* [ios] fix : if _fontFamily is nil set _fontFamily value with the correct system font. In the case of Chinese characters, this logic help system select the right system default font name."

This reverts commit 6e202b6a4328290392f3b6b3c0daeee35e4b15ea.

Hanks10100/weex,dianwodaMobile/DWeex,acton393/weex,acton393/incubator-weex,alibaba/weex,miomin/incubator-weex,Neeeo/incubator-weex,acton393/weex,erha19/incubator-weex,weexteam/incubator-weex,KalicyZhou/incubator-weex,cxfeng1/incubator-weex,yuguitao/incubator-weex,MrRaindrop/incubator-weex,alibaba/weex,Hanks10100/weex,weexteam/incubator-weex,Hanks10100/incubator-weex,cxfeng1/incubator-weex,cxfeng1/incubator-weex,leoward/incubator-weex,acton393/weex,weexteam/incubator-weex,yuguitao/incubator-weex,acton393/weex,leoward/incubator-weex,acton393/incubator-weex,acton393/incubator-weex,erha19/incubator-weex,alibaba/weex,MrRaindrop/incubator-weex,xiayun200825/weex,dianwodaMobile/DWeex,KalicyZhou/incubator-weex,KalicyZhou/incubator-weex,Hanks10100/incubator-weex,MrRaindrop/incubator-weex,Neeeo/incubator-weex,yuguitao/incubator-weex,alibaba/weex,leoward/incubator-weex,yuguitao/incubator-weex,yuguitao/incubator-weex,KalicyZhou/incubator-weex,Hanks10100/weex,yuguitao/incubator-weex,Hanks10100/incubator-weex,dianwodaMobile/DWeex,MrRaindrop/incubator-weex,leoward/incubator-weex,acton393/incubator-weex,weexteam/incubator-weex,cxfeng1/incubator-weex,Hanks10100/incubator-weex,alibaba/weex,leoward/incubator-weex,acton393/incubator-weex,MrRaindrop/incubator-weex,Neeeo/incubator-weex,miomin/incubator-weex,erha19/incubator-weex,miomin/incubator-weex,erha19/incubator-weex,erha19/incubator-weex,Hanks10100/weex,cxfeng1/incubator-weex,acton393/weex,erha19/incubator-weex,Neeeo/incubator-weex,Neeeo/incubator-weex,MrRaindrop/incubator-weex,Hanks10100/weex,xiayun200825/weex,leoward/incubator-weex,Neeeo/incubator-weex,erha19/incubator-weex,acton393/incubator-weex,acton393/weex,cxfeng1/incubator-weex,miomin/incubator-weex,xiayun200825/weex,dianwodaMobile/DWeex,dianwodaMobile/DWeex,Hanks10100/weex,alibaba/weex,xiayun200825/weex,weexteam/incubator-weex,Hanks10100/incubator-weex,alibaba/weex,weexteam/incubator-weex,KalicyZhou/incubator-weex,dianwodaMobile/DWeex,miomin/incubator-weex,Hanks10100/incubator-weex,KalicyZhou/incubator-weex,erha19/incubator-weex,xiayun200825/weex,acton393/incubator-weex,miomin/incubator-weex,Hanks10100/incubator-weex,xiayun200825/weex,miomin/incubator-weex,miomin/incubator-weex,acton393/incubator-weex,Hanks10100/incubator-weex