gettext: remove spurious xz

diffoscope indicates that the builds with and without xz are identical.

pkgs/development/libraries/gettext/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, libiconv, xz, bash
+{ stdenv, lib, fetchurl, libiconv, bash
 }:
 
 # Note: this package is used for bootstrapping fetchurl, and thus
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
   LDFLAGS = lib.optionalString stdenv.isSunOS "-lm -lmd -lmp -luutil -lnvpair -lnsl -lidmap -lavl -lsec";
 
   configureFlags = [
-     "--disable-csharp" "--with-xz"
+     "--disable-csharp"
   ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
     # On cross building, gettext supposes that the wchar.h from libc
     # does not fulfill gettext needs, so it tries to work with its
@@ -50,10 +50,6 @@ stdenv.mkDerivation rec {
   '';
 
   strictDeps = true;
-  nativeBuildInputs = [
-    xz
-    xz.bin
-  ];
   buildInputs = lib.optionals (!stdenv.hostPlatform.isMinGW) [
     bash
   ]