执行以下语句：

git push origin :branch_name

注意：冒号前的空格不能少

理解：把一个空分支push到server上，相当于删除该分支

样例：

diabetic at bogon in ~/git/repository/work/trade (master) 

$ git pull

Already up-to-date.

diabetic at bogon in ~/git/repository/work/trade (master) 

$ git push origin :dev_for_fix_bug

To http://git.domain.iii/java/ftrade.git

 - [deleted]         dev_for_fix_bug