[PushNotification] Unregister for remote notifications support.

Libraries/PushNotificationIOS/PushNotificationIOS.js

@@ -75,6 +75,18 @@ class PushNotificationIOS {
     RCTPushNotificationManager.requestPermissions();
   }
 
+  /**
+   * Unregister for all remote notifications received via Apple Push Notification service.
+   *
+   * You should call this method in rare circumstances only, such as when a new version of
+   * the app removes support for all types of remote notifications. Users can temporarily
+   * prevent apps from receiving remote notifications through the Notifications section of
+   * the Settings app. Apps unregistered through this method can always re-register.
+   */
+  static abandonPermissions() {
+    RCTPushNotificationManager.abandonPermissions();
+  }
+
   /**
    * See what push permissions are currently enabled. `callback` will be
    * invoked with a `permissions` object:

Libraries/PushNotificationIOS/RCTPushNotificationManager.m

@@ -102,6 +102,11 @@ - (void)handleRemoteNotificationReceived:(NSNotification *)notification
   }
 }
 
+RCT_EXPORT_METHOD(abandonPermissions)
+{
+  [[UIApplication sharedApplication] unregisterForRemoteNotifications];
+}
+
 RCT_EXPORT_METHOD(checkPermissions:(RCTResponseSenderBlock)callback)
 {