[messaging][js] add deleteToken support - fixes #1335

src/index.d.ts

@@ -1051,6 +1051,8 @@ declare module 'react-native-firebase' {
          */
         getToken(): Promise<string>;
 
+        deleteToken(authorizedEntity?: string, scope?: string): Promise<void>;
+
         /**
          * On a new message,
          * the payload object is passed to the listener callback.

src/modules/messaging/index.js

@@ -160,13 +160,8 @@ export default class Messaging extends ModuleBase {
    * KNOWN UNSUPPORTED METHODS
    */
 
-  deleteToken() {
-    throw new Error(
-      INTERNALS.STRINGS.ERROR_UNSUPPORTED_MODULE_METHOD(
-        'messaging',
-        'deleteToken'
-      )
-    );
+  deleteToken(authorizedEntity?: string, scope?: string): Promise<void> {
+    return this.app.iid().deleteToken(authorizedEntity, scope);
   }
 
   setBackgroundMessageHandler() {