Revert of Implement GetDisplayed on android M+

chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationBuilderBase.java

Index: chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationBuilderBase.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationBuilderBase.java b/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationBuilderBase.java
index 94ee79608e7d19e1fc88eccca368e74f01ce3e3a..6635ecca72c969545d3f25e12d52abd9980284de 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationBuilderBase.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/notifications/NotificationBuilderBase.java
@@ -18,7 +18,6 @@
 import android.graphics.PorterDuffColorFilter;
 import android.graphics.drawable.Icon;
 import android.os.Build;
-import android.os.Bundle;
 
 import org.chromium.base.VisibleForTesting;
 import org.chromium.chrome.browser.widget.RoundedIconGenerator;
@@ -122,7 +121,6 @@
     protected long[] mVibratePattern;
     protected long mTimestamp;
     protected boolean mRenotify;
-    protected Bundle mExtras;
 
     private Bitmap mLargeIcon;
 
@@ -307,18 +305,6 @@
      */
     public NotificationBuilderBase setRenotify(boolean renotify) {
         mRenotify = renotify;
-        return this;
-    }
-
-    /**
-     * Sets the extras bundle on supported platforms.
-     */
-    @TargetApi(Build.VERSION_CODES.M)
-    public NotificationBuilderBase setExtras(Bundle extras) {
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
-            return this;
-        }
-        mExtras = extras;
         return this;
     }