update

README.md

@@ -575,29 +575,6 @@ Now, the `full_name` field in each array element will watch the `first_name` and
 Watching fields by itself doesn't do anything.  For the example above, you need to tell JSON Editor that `full_name` should be `fname [space] lname`.
 JSON Editor uses a javascript template engine to accomplish this.  A barebones template engine is included by default (simple `{{variable}}` replacement only), but many of the most popular template engines are also supported:
 
-*  ejs
-*  handlebars
-*  hogan
-*  markup
-*  mustache
-*  swig
-*  underscore >=1.7 (since 1.4.0, see also [#332](https://github.com/json-editor/json-editor/pull/332))
-
-You can change the default by setting `JSONEditor.defaults.options.template` to one of the supported template engines:
-
-```javascript
-JSONEditor.defaults.options.template = 'handlebars';
-```
-
-You can set the template engine on a per-instance basis as well:
-
-```js
-const editor = new JSONEditor(element,{
-  schema: schema,
-  template: 'hogan'
-});
-```
-
 Here is the completed `full_name` example using the default barebones template engine:
 
 ```js+jinja
@@ -622,40 +599,6 @@ Here is the completed `full_name` example using the default barebones template e
 }
 ```
 
-It is also possible to set the "template" property to a JavaScript callback function, defined under `window.JSONEditor.defaults.callbacks.template`. Inside the JavaScript callback, you have access to all the variables defined under the `watch` property + the current editor.
-
-
-Example Schema:
-```js+jinja
-{
-  "type": "object",
-  "properties": {
-    "first_name": {
-      "type": "string"
-    },
-    "last_name": {
-      "type": "string"
-    },
-    "full_name": {
-      "type": "string",
-      "template": "callbackFunction",
-      "watch": {
-        "fname": "first_name",
-        "lname": "last_name"
-      }
-    }
-  }
-}
-```
- Example Callback function:
-```js+jinja
-window.JSONEditor.defaults.callbacks.template = {
-  "callbackFunction": (jseditor,e) => {
-    return e.fname + " " + e.lname;
-  }
-};
-```
-
 ### Enum Values
 
 Another common dependency is a drop down menu whose possible values depend on other fields.  Here's an example: