doc(unvired-cordova-sdk): remove clearFunction

src/@ionic-native/plugins/unvired-cordova-sdk/index.ts

@@ -980,21 +980,12 @@ export class UnviredCordovaSDK extends IonicNativePlugin {
    * Only one class can subscribe to notifications are any point of time.
    */
   @Cordova({
-    observable: true,
-    clearFunction: 'unRegisterNotifListener'
+    observable: true
   })
   registerNotifListener(): Observable<NotifResult> {
     return;
   }
 
-  /**
-   * Unregister the notification listener previously registered.
-   */
-  @Cordova()
-  unRegisterNotifListener(): Promise<any> {
-    return;
-  }
-
   /**
    * Supported in mobile only
    * Check whether a Header datastructure is in outbox.