[EAGLE-944] UI remove useless css import
[EAGLE-944] UI remove useless css import

UI remove useless css import in index.html template

Author: zombieJ <smith3816@gmail.com>

Closes #860 from zombieJ/EAGLE-944.

haoch/Eagle,1haodian/eagle,haoch/Eagle,haoch/incubator-eagle,baibaichen/eagle,zombieJ/incubator-eagle,haoch/Eagle,qingwen220/eagle,haoch/incubator-eagle,baibaichen/eagle,haoch/incubator-eagle,anyway1021/incubator-eagle,1haodian/eagle,zombieJ/incubator-eagle,qingwen220/eagle,haoch/Eagle,qingwen220/eagle,1haodian/eagle,anyway1021/incubator-eagle,anyway1021/incubator-eagle,haoch/Eagle,1haodian/eagle,yonzhang/incubator-eagle,haoch/incubator-eagle,qingwen220/eagle,yonzhang/incubator-eagle,yonzhang/incubator-eagle,anyway1021/incubator-eagle,1haodian/eagle,baibaichen/eagle,baibaichen/eagle,haoch/incubator-eagle,qingwen220/eagle,yonzhang/incubator-eagle,zombieJ/incubator-eagle,zombieJ/incubator-eagle,anyway1021/incubator-eagle,anyway1021/incubator-eagle,haoch/incubator-eagle,zombieJ/incubator-eagle,baibaichen/eagle,yonzhang/incubator-eagle