weechatScripts.weechat-xmpp: remove

This plugin is fairly outdated and depends on python2 libraries that
don't receive any updates either (xmpppy for instance[1]).

[1] https://pypi.org/project/xmpppy/

pkgs/applications/networking/irc/weechat/scripts/default.nix

@@ -1,10 +1,6 @@
 { callPackage, luaPackages }:
 
 {
-  weechat-xmpp = callPackage ./weechat-xmpp {
-    inherit (pythonPackages) pydns;
-  };
-
   weechat-matrix-bridge = callPackage ./weechat-matrix-bridge {
     inherit (luaPackages) cjson luaffi;
   };

pkgs/applications/networking/irc/weechat/scripts/weechat-xmpp/default.nix

@@ -1,36 +0,0 @@
-{ stdenv, fetchFromGitHub, xmpppy, pydns, substituteAll, buildEnv }:
-
-stdenv.mkDerivation {
-  name = "weechat-jabber-2017-08-30";
-
-  src = fetchFromGitHub {
-    repo = "weechat-xmpp";
-    owner = "sleduc";
-    sha256 = "0s02xs0ynld9cxxzj07al364sfglyc5ir1i82133mq0s8cpphnxv";
-    rev = "8f6c21f5a160c9318c7a2d8fd5dcac7ab2e0d843";
-  };
-
-  installPhase = ''
-    mkdir -p $out/share
-    cp jabber.py $out/share/jabber.py
-  '';
-
-  patches = [
-    (substituteAll {
-      src = ./libpath.patch;
-      env = "${buildEnv {
-        name = "weechat-xmpp-env";
-        paths = [ pydns xmpppy ];
-      }}/lib/python2.7/site-packages";
-    })
-  ];
-
-  passthru.scripts = [ "jabber.py" ];
-
-  meta = with stdenv.lib; {
-    description = "A fork of the jabber plugin for weechat";
-    homepage = "https://github.com/sleduc/weechat-xmpp";
-    maintainers = with maintainers; [ ma27 ];
-    license = licenses.gpl3Plus;
-  };
-}

pkgs/applications/networking/irc/weechat/scripts/weechat-xmpp/libpath.patch

@@ -1,16 +0,0 @@
-diff --git a/jabber.py b/jabber.py
-index 27006a3..e53c2c0 100644
---- a/jabber.py
-+++ b/jabber.py
-@@ -95,6 +95,11 @@ SCRIPT_COMMAND = SCRIPT_NAME
- import re
- import warnings
- 
-+import sys
-+
-+sys.path.append('@env@')
-+
-+
- import_ok = True
- 
- try: