Revert "apparmor: fix and improve the service"

This reverts commit fb6d63f3fd.

I really hope this finally fixes #99236: evaluation on Hydra.
This time I really did check basically the same commit on Hydra:
https://hydra.nixos.org/eval/1618011

Right now I don't have energy to find what exactly is wrong in the
commit, and it doesn't seem important in comparison to nixos-unstable
channel being stuck on a commit over one week old.

pkgs/tools/networking/inetutils/default.nix

@@ -1,6 +1,4 @@
-{ stdenv, lib, fetchurl, ncurses, perl, help2man
-, apparmorRulesFromClosure
-}:
+{ stdenv, lib, fetchurl, ncurses, perl, help2man }:
 
 stdenv.mkDerivation rec {
   name = "inetutils-1.9.4";
@@ -10,8 +8,6 @@ stdenv.mkDerivation rec {
     sha256 = "05n65k4ixl85dc6rxc51b1b732gnmm8xnqi424dy9f1nz7ppb3xy";
   };
 
-  outputs = ["out" "apparmor"];
-
   patches = [
     ./whois-Update-Canadian-TLD-server.patch
     ./service-name.patch
@@ -45,22 +41,6 @@ stdenv.mkDerivation rec {
 
   installFlags = [ "SUIDMODE=" ];
 
-  postInstall = ''
-    install -D /dev/stdin $apparmor/bin.ping <<EOF
-    $out/bin/ping {
-      include <abstractions/base>
-      include <abstractions/consoles>
-      include <abstractions/nameservice>
-      include "${apparmorRulesFromClosure {} [stdenv.cc.libc]}"
-      include <local/bin.ping>
-      capability net_raw,
-      network inet raw,
-      network inet6 raw,
-      mr $out/bin/ping,
-    }
-    EOF
-  '';
-
   meta = with lib; {
     description = "Collection of common network programs";