Remove unused feedback class in dom distiller component

chrome/android/java/src/org/chromium/chrome/browser/childaccounts/ExternalFeedbackReporter.java

Index: chrome/android/java/src/org/chromium/chrome/browser/childaccounts/ExternalFeedbackReporter.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/childaccounts/ExternalFeedbackReporter.java b/chrome/android/java/src/org/chromium/chrome/browser/childaccounts/ExternalFeedbackReporter.java
deleted file mode 100644
index 4d307574446de02f113611e8128a35438597656c..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/childaccounts/ExternalFeedbackReporter.java
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.chrome.browser.childaccounts;
-
-import android.app.Activity;
-
-/**
- * Provides a way of reporting feedback to an external feedback service.
- */
-public interface ExternalFeedbackReporter {
-    /**
-     * Records feedback related to child account features.
-     *
-     * @param activity the activity to take a screenshot of.
-     * @param description default description text.
-     * @param url the URL to report feedback for.
-     */
-    void reportFeedback(Activity activity, String description, String url);
-}