refactor: remove override callback

Author: ivandotv

lib/koa-api/src/koa-api.ts

@@ -55,20 +55,16 @@ export class KoaApi extends Koa {
   async run(req: NextApiRequest, res: NextApiResponse) {
     const p = new Promise((resolve) => onFinished(res, resolve))
 
-    this.callback()(req, res) as unknown as Promise<void>
-
-    return p
-  }
-
-  override callback() {
     if (this.firstRun) {
       this.firstRun = false
       this.use(this.router.routes()).use(
         this.router.allowedMethods(this.options.routerAllowedMethods)
       )
     }
 
-    return super.callback()
+    this.callback()(req, res) as unknown as Promise<void>
+
+    return p
   }
 
   createNewRouter(opts?: RouterOptions) {