Remove incorrect note from add event listener method (#204)

* Remove incorrect note from add event listener method

* Update method documentation

Author: josh-

src/index.tsx

@@ -277,9 +277,7 @@ export type IntercomType = {
   setLogLevel(logLevel: LogLevelType): Promise<boolean>;
 
   /**
-   * Add an `EventListener` to listen for `IntercomUnreadCountDidChange` events.
-   *
-   * @note This function is for Android only.
+   * Add an event listener for the supported event types.
    */
   addEventListener: (
     event: EventType,