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/shells/zsh/antibody/default.nix

@@ -21,6 +21,6 @@ buildGoModule rec {
     description = "The fastest shell plugin manager";
     homepage = "https://github.com/getantibody/antibody";
     license = licenses.mit;
-    maintainers = with maintainers; [ Br1ght0ne worldofpeace ];
+    maintainers = with maintainers; [ Br1ght0ne ];
   };
 }