treewide: remove worldofpeace from meta.maintainers

(It was requested by them.)
I left one case due to fetching from their personal repo:
pkgs/desktops/pantheon/desktop/extra-elementary-contracts/default.nix

pkgs/development/libraries/zeitgeist/default.nix

@@ -82,7 +82,7 @@ stdenv.mkDerivation rec {
   meta = with lib; {
     description = "A service which logs the users’s activities and events";
     homepage = "https://zeitgeist.freedesktop.org/";
-    maintainers = with maintainers; [ lethalman worldofpeace ];
+    maintainers = with maintainers; [ lethalman ];
     license = licenses.lgpl21Plus;
     platforms = platforms.linux;
   };