Cleanup: Remove partial InstantSearch implementation on Android

chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
index 0db930fc44cab8c04e1d4ffcb7a37d20b5599ac4..25e60a1dfc7accaf137ef742003bbbf0207810b8 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
@@ -2317,15 +2317,6 @@ public class Tab implements ViewGroup.OnHierarchyChangeListener,
     }
 
     /**
-     * A helper method to allow subclasses to handle the Instant support
-     * disabled event.
-     */
-    @CalledByNative
-    private void onWebContentsInstantSupportDisabled() {
-        for (TabObserver observer : mObservers) observer.onWebContentsInstantSupportDisabled();
-    }
-
-    /**
      * @return The {@link WindowAndroid} associated with this {@link Tab}.
      */
     public WindowAndroid getWindowAndroid() {