libnih: remove

libnih is a niche low-level library. It was used for lxc and cgmanager.
Reverse dependencies were removed of transitioned from libnih a few years ago.

Nowadays libnih does not build against upstream gcc-10. Let's remove it.

pkgs/development/libraries/libnih/default.nix

@@ -1,25 +0,0 @@
-{ lib, stdenv, fetchurl, pkg-config, dbus, expat }:
-
-let version = "1.0.3"; in
-
-stdenv.mkDerivation {
-  pname = "libnih";
-  inherit version;
-
-  src = fetchurl {
-    url = "https://code.launchpad.net/libnih/1.0/${version}/+download/libnih-${version}.tar.gz";
-    sha256 = "01glc6y7z1g726zwpvp2zm79pyb37ki729jkh45akh35fpgp4xc9";
-  };
-
-  nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ dbus expat ];
-
-  doCheck = false; # fails 1 of 17 test
-
-  meta = {
-    description = "A small library for C application development";
-    homepage = "https://launchpad.net/libnih";
-    license = lib.licenses.gpl2;
-    platforms = lib.platforms.linux;
-  };
-}

pkgs/top-level/aliases.nix

@@ -677,6 +677,7 @@ mapAliases ({
   liblastfm = libsForQt5.liblastfm; # Added 2020-06-14
   liblrdf = throw "'liblrdf' has been renamed to/replaced by 'lrdf'"; # Converted to throw 2022-02-22
   libmsgpack = throw "'libmsgpack' has been renamed to/replaced by 'msgpack'"; # Converted to throw 2022-02-22
+  libnih = throw "'libnih' has been removed"; # Converted to throw 2022-05-17
   libosmpbf = throw "libosmpbf was removed because it is no longer required by osrm-backend";
   libpng_apng = throw "libpng_apng has been removed, because it is equivalent to libpng"; # Added 2021-03-21
   libpulseaudio-vanilla = libpulseaudio; # Added 2022-04-20

pkgs/top-level/all-packages.nix

@@ -19036,8 +19036,6 @@ with pkgs;
 
   libnftnl = callPackage ../development/libraries/libnftnl { };
 
-  libnih = callPackage ../development/libraries/libnih { };
-
   libnova = callPackage ../development/libraries/science/astronomy/libnova { };
 
   libnxml = callPackage ../development/libraries/libnxml { };