unalias [-a] name [name ...]
Remove each NAME from the list of defined aliases. If -a is supplied, remove all alias definitions.
Exit Status: Returns success (0) unless a NAME is not an existing alias, in which case it returns failure (1).
Reference: https://cgit.git.savannah.gnu.org/cgit/bash.git/plain/builtins/alias.def?h=bash-5.3