[SplitSettings] Remove icon in browser banner

- Removes the external page icon since it is already a link

Bug: 998434
Change-Id: I46d2159c6e95ee172a66d9327a4a5d68fc02d578
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1775371
Auto-Submit: Bailey Berro <baileyberro@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Bailey Berro <baileyberro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#691474}

chrome/browser/resources/settings/chromeos/os_settings_page/os_settings_page.html

@@ -116,8 +116,6 @@
                link to settings.-->
             <a href="chrome://settings" target="_blank"
                 tabindex="-1" role="presentation">
-              <iron-icon id="openInNewBrowserSettingsIcon"
-                  icon="cr:open-in-new"></iron-icon>
             </a>
           </div>
           <cr-icon-button class="icon-clear"