acsccid: Remove myself as maintainer

I don't use it anymore.

pkgs/tools/security/acsccid/default.nix

···
     '';
     homepage = src.meta.homepage;
     license = licenses.lgpl2Plus;
-    maintainers = with maintainers; [ roberth ];
+    maintainers = with maintainers; [ ];
     platforms = with platforms; unix;
   };
 }