fix. didn't remove event listener when invoke destroyed

lib/RtcEngine.native.js

@@ -329,6 +329,7 @@ class RtcEngine {
      * @return void
      */
     static destroy() {
+        Agora.removeAllListeners();
         return Agora.destroy();
     }
     /**

src/RtcEngine.native.ts

@@ -379,6 +379,7 @@ class RtcEngine {
      * @return void
      */
     public static destroy() {
+        Agora.removeAllListeners();
         return Agora.destroy();
     }