Fix up test

Author: pksjce

src/__tests__/__snapshots__/AnchoredOverlay.test.tsx.snap

@@ -216,11 +216,6 @@ exports[`AnchoredOverlay should render consistently when open 1`] = `
           style="top: 4px; left: 0px; --styled-overlay-visibility: visible;"
           width="auto"
         >
-          <span
-            aria-hidden="true"
-            class="sentinel"
-            tabindex="0"
-          />
           <button
             class="focus-visible"
             data-focus-visible-added=""
@@ -229,11 +224,6 @@ exports[`AnchoredOverlay should render consistently when open 1`] = `
           >
             Focusable Child
           </button>
-          <span
-            aria-hidden="true"
-            class="sentinel"
-            tabindex="0"
-          />
         </div>
       </div>
     </div>