treewide: remove vrthra and lovek323 from meta.maintainers [no orphans]

Tracking issue: https://github.com/NixOS/nixpkgs/issues/290642

Inactive since at least 2017 and 2022 respectively.

pkgs/development/interpreters/guile/2.0.nix

···
         processing.
       '';
     license = licenses.lgpl3Plus;
-    maintainers = with maintainers; [ ludo lovek323 vrthra ];
+    maintainers = with maintainers; [ ludo ];
     platforms = platforms.all;
   };
 }

pkgs/development/interpreters/guile/2.2.nix

···
       foreign function call interface, and powerful string processing.
     '';
     license = licenses.lgpl3Plus;
-    maintainers = with maintainers; [ ludo lovek323 vrthra ];
+    maintainers = with maintainers; [ ludo ];
     platforms = platforms.all;
   };
 }