Clear legacy code about AppAndNotificationDashboard

Bug: 183670633
Test: make -j
Change-Id: Ib763becd8febe86e54b3123c69efae9bd8bf86b4
diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
index 8f06c1f..404207d 100644
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -309,7 +309,6 @@
     public static class NetworkDashboardActivity extends SettingsActivity {}
     public static class ConnectedDeviceDashboardActivity extends SettingsActivity {}
     public static class PowerUsageSummaryActivity extends SettingsActivity { /* empty */ }
-    public static class AppAndNotificationDashboardActivity extends SettingsActivity {}
     public static class StorageDashboardActivity extends SettingsActivity {}
     public static class AccountDashboardActivity extends SettingsActivity {}
     public static class SystemDashboardActivity extends SettingsActivity {}
diff --git a/src/com/android/settings/core/gateway/SettingsGateway.java b/src/com/android/settings/core/gateway/SettingsGateway.java
index 3719a5c..d0fb7ab 100644
--- a/src/com/android/settings/core/gateway/SettingsGateway.java
+++ b/src/com/android/settings/core/gateway/SettingsGateway.java
@@ -320,7 +320,6 @@
             // Home page
             Settings.NetworkDashboardActivity.class.getName(),
             Settings.ConnectedDeviceDashboardActivity.class.getName(),
-            Settings.AppAndNotificationDashboardActivity.class.getName(),
             Settings.AppDashboardActivity.class.getName(),
             Settings.DisplaySettingsActivity.class.getName(),
             Settings.SoundSettingsActivity.class.getName(),