How to remove zsh alias?

I have an alias which is predefined by an oh-my-zsh plugin. -> % alias gcm gcm='git checkout master' I'd like to remove it, i.e. I'd like alias | pcregrep "\bgcm\b" return 1. I've tried with alias gcm='' but after that the alias is still existent.

Answer

You can remove an alias simply using:

$ unalias gcm