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/development/libraries/zlog/default.nix

@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
     homepage = http://hardysimpson.github.com/zlog;
     license = licenses.lgpl21;
     platforms = platforms.linux; # cannot test on something else
-    maintainers = [ maintainers.matthiasbeyer ];
+    maintainers = [ ];
   };
 
 }

pkgs/development/misc/loc/default.nix

@@ -19,7 +19,7 @@ buildRustPackage rec {
     homepage = https://github.com/cgag/loc;
     description = "Count lines of code quickly";
     license = stdenv.lib.licenses.mit;
-    maintainers = [ stdenv.lib.maintainers.matthiasbeyer ];
+    maintainers = with stdenv.lib.maintainers; [ ];
     platforms = with stdenv.lib.platforms; linux;
   };
 }

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

@@ -22,6 +22,6 @@ buildPythonPackage rec {
     description = "Python interface to Graphviz graph drawing package";
     homepage = https://github.com/pygraphviz/pygraphviz;
     license = licenses.bsd3;
-    maintainers = with maintainers; [ matthiasbeyer ];
+    maintainers = with maintainers; [ ];
   };
 }

pkgs/development/python-modules/requests-toolbelt/default.nix

@@ -27,6 +27,6 @@ buildPythonPackage rec {
   meta = {
     description = "A toolbelt of useful classes and functions to be used with python-requests";
     homepage = http://toolbelt.rtfd.org;
-    maintainers = with lib.maintainers; [ matthiasbeyer jgeerds ];
+    maintainers = with lib.maintainers; [ jgeerds ];
   };
-}
+}

pkgs/development/tools/database/sqlitebrowser/default.nix

@@ -33,7 +33,7 @@ mkDerivation rec {
     description = "DB Browser for SQLite";
     homepage = http://sqlitebrowser.org/;
     license = licenses.gpl3;
-    maintainers = with maintainers; [ matthiasbeyer ];
+    maintainers = with maintainers; [ ];
     platforms = platforms.linux; # can only test on linux
   };
 }