[fix]imageService删掉evenitId review by qiw

Author: luoxiao-supermap

src/common/iServer/ImageService.js

@@ -83,6 +83,7 @@ export default class ImageService extends CommonServiceBase {
       scope: this,
       processCompleted: function (result) {
         if (eventId === result.result.eventId && callback) {
+          delete result.result.eventId;
           callback(result);
           this.events && this.events.un(eventListeners);
           return false;