diff --git a/dialog-polyfill.css b/dialog-polyfill.css
index 4b13625..3ba0abe 100644
--- a/dialog-polyfill.css
+++ b/dialog-polyfill.css
@@ -25,15 +25,6 @@ dialog + .backdrop {
   background: rgba(0,0,0,0.1);
 }
 
-/* for small devices, modal dialogs go full-screen */
-@media screen and (max-width: 540px) {
-  dialog[_polyfill_modal] {  /* TODO: implement */
-    top: 0;
-    width: auto;
-    margin: 1em;
-  }
-}
-
 ._dialog_overlay {
   position: fixed;
   top: 0; right: 0; bottom: 0; left: 0;