how can I delete a remote branch in github code example

Example 1: delete branch git

//delete locally
git branch -d branch_name

//delete remotely
//git push <remote_name> :<branch_name>
// ex. git push origin :serverfix

Example 2: How to Delete Local/Remote Git Branches

$ git branch -a

# *master
# b1
# remote/origin/master
# remote/origin/b1

$ git push origin --delete b1
# [...]
# - [deleted] b1