unlimit [ -hs ] resource ...
       The resource limit for each resource is set to the hard limit.  If
       the -h flag is given and the shell has appropriate privileges, the
       hard resource limit for each resource is removed.  The resources
       of the shell process are only changed if the -s flag is given.

       The unlimit command is not made available by default when the
       shell starts in a mode emulating another shell.  It can be made
       available with the command `zmodload -F zsh/rlimits b:unlimit'.
