Remove subscribeToTopic method

Author: Axel Vencatareddy

README.md

@@ -329,10 +329,6 @@ Uses the [ShortcutBadger](https://github.com/leolin310148/ShortcutBadger) on And
 ## Sending Notification Data From Server
 Same parameters as `PushNotification.localNotification()`
 
-## Android Only Methods
-
-`PushNotification.subscribeToTopic(topic: string)` Subscribe to a topic (works only with Firebase)
-
 ## iOS Only Methods
 `PushNotification.checkPermissions(callback: Function)` Check permissions
 

android/src/main/java/com/dieam/reactnativepushnotification/modules/RNPushNotification.java

@@ -117,11 +117,6 @@ public void requestPermissions(String senderID) {
         reactContext.startService(GCMService);
     }
 
-    @ReactMethod
-    public void subscribeToTopic(String topic) {
-        FirebaseMessaging.getInstance().subscribeToTopic(topic);
-    }
-
     @ReactMethod
     public void presentLocalNotification(ReadableMap details) {
         Bundle bundle = Arguments.toBundle(details);

component/index.android.js

@@ -30,10 +30,6 @@ NotificationsComponent.prototype.requestPermissions = function(senderID: string)
 	RNPushNotification.requestPermissions(senderID);
 };
 
-NotificationsComponent.prototype.subscribeToTopic = function(topic: string) {
-	RNPushNotification.subscribeToTopic(topic);
-};
-
 NotificationsComponent.prototype.cancelLocalNotifications = function(details: Object) {
 	RNPushNotification.cancelLocalNotifications(details);
 };