I've only recently tried my hand at forking in github and would like some "best practice" advice.
I created a branch in my fork, and that branch got pulled into master of the upstream project. It no longer appears in the network graph, but it's still there on the github. Is it safe for me to delete this branch on the fork now?
Edit: Just to clarify, I'm checking if this conflicts with github's "don't change history" rule.