Revert of Introduce new test for bookmark loading.

chrome/browser/resources/pdf/pdf.js

Index: chrome/browser/resources/pdf/pdf.js
diff --git a/chrome/browser/resources/pdf/pdf.js b/chrome/browser/resources/pdf/pdf.js
index 1c86bd91cf6f432a2e6e0e5e13c81df02691b218..b82f9132842777c3bd55ae2556471b51762a743d 100644
--- a/chrome/browser/resources/pdf/pdf.js
+++ b/chrome/browser/resources/pdf/pdf.js
@@ -613,16 +613,5 @@
    */
   get viewport() {
     return this.viewport_;
-  },
-
-  /**
-   * Each bookmark is an Object containing a:
-   * - title
-   * - page (optional)
-   * - array of children (themselves bookmarks)
-   * @type {Array} the top-level bookmarks of the PDF.
-   */
-  get bookmarks() {
-    return this.bookmarks_;
   }
 };