paxctl: remove setup hook

It only contained the `paxmark` function, which was a nonstandard abstraction for the `paxctl` command.

Closes #341722

pkgs/os-specific/linux/paxctl/default.nix

@@ -22,8 +22,6 @@ stdenv.mkDerivation rec {
     "MANDIR=share/man/man1"
   ];
 
-  setupHook = ./setup-hook.sh;
-
   meta = with lib; {
     description = "Tool for controlling PaX flags on a per binary basis";
     mainProgram = "paxctl";

pkgs/os-specific/linux/paxctl/setup-hook.sh

@@ -1,8 +0,0 @@
-# PaX-mark binaries.
-paxmark() {
-    local flags="$1"
-    shift
-
-    paxctl -c "$@"
-    paxctl -zex -${flags} "$@"
-}