先切换到别的分支，然后删除那个分支。
示例：
zengyu@zengyu-Precision-T1700:~/private/Demo$ git branch -a
* master
remotes/origin/HEAD -> origin/master
remotes/origin/branch1
remotes/origin/master
zengyu@zengyu-Precision-T1700:~/private/Demo$ git push origin --delete branch1
To [email protected]:frogfans/Demo.git
- [deleted] branch1
zengyu@zengyu-Precision-T1700:~/private/Demo$ git branch -a
* master
remotes/origin/HEAD -> origin/master
remotes/origin/master
