remove useless CSS directive
remove useless CSS directive

Lw-Cui/vimium,Robinson10240/vimium,Robinson10240/vimium,justalittlenoob/vimium,wildeyes/vimium,Aleroniponi/vimium,philc/vimium,borgified/vimium,elderbas/vimium,elegantwww/vimium,tuchangwei/vimium,philc/vimium,tuchangwei/vimium,hhsue/vimium,hhsue/vimium,bkudria/vimium,shaung/vimium,borgified/vimium,smblott-github/vimium,elegantwww/vimium,Lw-Cui/vimium,VPashkov/vimium,elegantwww/vimium,cyrixhero/vimium,gdh1995/vimium,poacher2k/vimium,cyrixhero/vimium,justalittlenoob/vimium,willsALMANJ/vimium,smblott-github/vimium-smblott,PrestanceDesign/vimium,jb55/vimium-plus,cyrixhero/vimium,PickRelated/vimium,douglas-larocca/vimium,borgified/vimium,dimatter/vimium,gdh1995/vimium,willsALMANJ/vimium,bkudria/vimium,philc/vimium,csmalin/vimium,jb55/vimium-plus,smblott-github/vimium,mrmr1993/vimium,decaffeinate-examples/vimium,decaffeinate-examples/vimium,csmalin/vimium,PickRelated/vimium,smblott-github/vimium-smblott,mrmr1993/vimium,wildeyes/vimium,justalittlenoob/vimium,crazypenguincode/vimium,PrestanceDesign/vimium,tuchangwei/vimium,poacher2k/vimium,zhangmin510/vimium,decaffeinate-examples/vimium,VPashkov/vimium,douglas-larocca/vimium,elderbas/vimium,zhangmin510/vimium,willsALMANJ/vimium,Aleroniponi/vimium,VPashkov/vimium,mrmr1993/vimium,dimatter/vimium,dimatter/vimium,elderbas/vimium,gdh1995/vimium,smblott-github/vimium,PrestanceDesign/vimium,douglas-larocca/vimium,hhsue/vimium,PickRelated/vimium,zhangmin510/vimium,csmalin/vimium,poacher2k/vimium,wildeyes/vimium,bkudria/vimium,Robinson10240/vimium,Aleroniponi/vimium,crazypenguincode/vimium,Lw-Cui/vimium