treewide: remove maintainership of ma27 from a few packages

Those are packages I don't use anymore for a longer time and I therefore
don't think that listing me as maintainer is a good idea. If those
should be removed now, I'd be fine with that.

SuperSandro2000 will take care of a few packages[1].

[1] https://github.com/NixOS/nixpkgs/pull/108126#pullrequestreview-560599381

pkgs/development/python-modules/pyaxmlparser/default.nix

@@ -30,6 +30,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/appknox/pyaxmlparser";
     # Files from Androguard are licensed ASL 2.0
     license = with licenses; [ mit asl20 ];
-    maintainers = with maintainers; [ ma27 ];
+    maintainers = with maintainers; [ SuperSandro2000 ];
   };
 }