diff --git a/samples/client/petstore/javascript-promise-es6/src/model/ModelReturn.js b/samples/client/petstore/javascript-promise-es6/src/model/ModelReturn.js
deleted file mode 100644
index bdfe578288a..00000000000
--- a/samples/client/petstore/javascript-promise-es6/src/model/ModelReturn.js
+++ /dev/null
@@ -1,72 +0,0 @@
-/**
- * OpenAPI Petstore
- * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
- *
- * The version of the OpenAPI document: 1.0.0
- * 
- *
- * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
- * https://openapi-generator.tech
- * Do not edit the class manually.
- *
- */
-
-import ApiClient from '../ApiClient';
-
-/**
- * The ModelReturn model module.
- * @module model/ModelReturn
- * @version 1.0.0
- */
-class ModelReturn {
-    /**
-     * Constructs a new <code>ModelReturn</code>.
-     * Model for testing reserved words
-     * @alias module:model/ModelReturn
-     */
-    constructor() { 
-        
-        ModelReturn.initialize(this);
-    }
-
-    /**
-     * Initializes the fields of this object.
-     * This method is used by the constructors of any subclasses, in order to implement multiple inheritance (mix-ins).
-     * Only for internal use.
-     */
-    static initialize(obj) { 
-    }
-
-    /**
-     * Constructs a <code>ModelReturn</code> from a plain JavaScript object, optionally creating a new instance.
-     * Copies all relevant properties from <code>data</code> to <code>obj</code> if supplied or a new instance if not.
-     * @param {Object} data The plain JavaScript object bearing properties of interest.
-     * @param {module:model/ModelReturn} obj Optional instance to populate.
-     * @return {module:model/ModelReturn} The populated <code>ModelReturn</code> instance.
-     */
-    static constructFromObject(data, obj) {
-        if (data) {
-            obj = obj || new ModelReturn();
-
-            if (data.hasOwnProperty('return')) {
-                obj['return'] = ApiClient.convertToType(data['return'], 'Number');
-            }
-        }
-        return obj;
-    }
-
-
-}
-
-/**
- * @member {Number} return
- */
-ModelReturn.prototype['return'] = undefined;
-
-
-
-
-
-
-export default ModelReturn;
-