diff --git a/packages/a11y-base/src/list-mixin.js b/packages/a11y-base/src/list-mixin.js
index 87e76e4e11..e657fd4274 100644
--- a/packages/a11y-base/src/list-mixin.js
+++ b/packages/a11y-base/src/list-mixin.js
@@ -265,15 +265,6 @@ export const ListMixin = (superClass) =>
       super._onKeyDown(event);
     }
 
-    /**
-     * @param {!Element} item
-     * @return {boolean}
-     * @protected
-     */
-    _isItemHidden(item) {
-      return getComputedStyle(item).display === 'none';
-    }
-
     /**
      * @param {number} idx
      * @protected