[MD settings] help button in content settings site lists

chrome/browser/resources/settings/site_settings/site_settings_category.js

Index: chrome/browser/resources/settings/site_settings/site_settings_category.js
diff --git a/chrome/browser/resources/settings/site_settings/site_settings_category.js b/chrome/browser/resources/settings/site_settings/site_settings_category.js
index b2553e3d24a603ef9af7ef601e4e3379a26f1a78..dc96422163c7d2238082e5f127cf354e08abb80b 100644
--- a/chrome/browser/resources/settings/site_settings/site_settings_category.js
+++ b/chrome/browser/resources/settings/site_settings/site_settings_category.js
@@ -194,12 +194,6 @@ Polymer({
   },
 
   /** @private */
-  onLearnMoreClicked_: function() {
-    window.open(
-        'https://support.google.com/chrome/?p=settings_manage_exceptions');
-  },
-
-  /** @private */
   onAdobeFlashStorageClicked_: function() {
     window.open('https://www.macromedia.com/support/' +
         'documentation/en/flashplayer/help/settings_manager07.html');