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  re-
       sources  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'.