Remove all blimp client code.

blimp/client/core/settings/android/java/src/org/chromium/blimp/core/settings/SettingsObserver.java

Index: blimp/client/core/settings/android/java/src/org/chromium/blimp/core/settings/SettingsObserver.java
diff --git a/blimp/client/core/settings/android/java/src/org/chromium/blimp/core/settings/SettingsObserver.java b/blimp/client/core/settings/android/java/src/org/chromium/blimp/core/settings/SettingsObserver.java
deleted file mode 100644
index 69087e37df35d92b53312fefbdc8485c462334d5..0000000000000000000000000000000000000000
--- a/blimp/client/core/settings/android/java/src/org/chromium/blimp/core/settings/SettingsObserver.java
+++ /dev/null
@@ -1,34 +0,0 @@
-// Copyright 2016 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.blimp.core.settings;
-
-/**
- * SettingsObserver is the Java representation of a native SettingsObserver object.
- *
- * The SettingsObserver is an observer API implemented by classes which are interested in
- * various events related to {@link Settings}.
- */
-public interface SettingsObserver {
-    /**
-     * Invoked when enabling or disabling Blimp mode in the Settings.
-     */
-    void onBlimpModeEnabled(boolean enable);
-
-    /**
-     * Invoked when enabling or disabling to show the network stats in the Settings.
-     */
-    void onShowNetworkStatsChanged(boolean enable);
-
-    /**
-     * Invoked when enabling or disabling to download the whole document in the Settings.
-     */
-    void onRecordWholeDocumentChanged(boolean enable);
-
-    /**
-     * Invoked when a setting changed that requires the application to restart before it can take
-     * effect.
-     */
-    void onRestartRequired();
-}