Remove maintainership

With this patch I remove myself as a maintainer for all packages I
currently maintain.

This is due the fact that I will be basically off the grid from May 2018
until early 2019, as I will be on a trip through north america.

I will revert this patch as soon as I'm back, as I plan to continue
contributing to nixpkgs then.
But as I cannot maintain anything during that time, I'd like to get this
patch merged.

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>

pkgs/applications/office/beancount/bean-add.nix

@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
     # The (only) source file states:
     #   License: "Do what you feel is right, but don't be a jerk" public license.
 
-    maintainers = with stdenv.lib.maintainers; [ matthiasbeyer ];
+    maintainers = with stdenv.lib.maintainers; [ ];
   };
 }
 

pkgs/applications/office/beancount/default.nix

@@ -38,7 +38,7 @@ pythonPackages.buildPythonApplication rec {
         generate a variety of reports from them, and provides a web interface.
     '';
     license = stdenv.lib.licenses.gpl2;
-    maintainers = with stdenv.lib.maintainers; [ matthiasbeyer ];
+    maintainers = with stdenv.lib.maintainers; [ ];
   };
 }