Revert "MD History: promote menu button to show clear browsing data in narrow mode"

chrome/browser/resources/md_history/history_toolbar.js

Index: chrome/browser/resources/md_history/history_toolbar.js
diff --git a/chrome/browser/resources/md_history/history_toolbar.js b/chrome/browser/resources/md_history/history_toolbar.js
index 488883af151e1edf47f67d7de2b8ce9bbaf0b895..23c71de7a3bb669a2ba80286ca119425d7803e99 100644
--- a/chrome/browser/resources/md_history/history_toolbar.js
+++ b/chrome/browser/resources/md_history/history_toolbar.js
@@ -63,15 +63,6 @@ Polymer({
 
     // The end time of the query range.
     queryEndTime: String,
-
-    // Whether to show the menu promo (a tooltip that points at the menu button
-    // in narrow mode).
-    showMenuPromo_: {
-      type: Boolean,
-      value: function() {
-        return loadTimeData.getBoolean('showMenuPromo');
-      },
-    },
   },
 
   /**
@@ -99,11 +90,6 @@ Polymer({
     searchField.setValue(search);
   },
 
-  /** @private */
-  onMenuPromoShown_: function() {
-    md_history.BrowserService.getInstance().menuPromoShown();
-  },
-
   /**
    * @param {!CustomEvent} event
    * @private