cron: remove sbin from PATH

follow up of https://github.com/NixOS/nixpkgs/pull/25550

Changed files
+1 -1
pkgs
tools
system
+1 -1
pkgs/tools/system/cron/default.nix
···
#define _PATH_SENDMAIL "${sendmailPath}"
#undef _PATH_DEFPATH
-
#define _PATH_DEFPATH "/run/wrappers/bin:/nix/var/nix/profiles/default/bin:/nix/var/nix/profiles/default/sbin:/run/current-system/sw/bin:/run/current-system/sw/sbin:/usr/bin:/bin"
+
#define _PATH_DEFPATH "/run/wrappers/bin:/nix/var/nix/profiles/default/bin:/run/current-system/sw/bin:/usr/bin:/bin"
__EOT__
# Implicit saved uids do not work here due to way NixOS uses setuid wrappers