Remove obsolete message

Author: erikjanwestendorp

14/umbraco-cms/fundamentals/backoffice/property-editors/built-in-umbraco-property-editors/block-editor/block-grid-editor.md

@@ -630,10 +630,6 @@ public class BlockGridElementData
 
 9. By injecting [ContentService](https://apidocs.umbraco.com/v14/csharp/api/Umbraco.Cms.Core.Services.ContentService.html) and [ContentTypeService](https://apidocs.umbraco.com/v14/csharp/api/Umbraco.Cms.Core.Services.ContentTypeService.html) into an API controller, we can transform the raw data into Block Grid JSON. It can then be saved to the target content item. Create a class called **BlockGridTestController.cs** containing the following:
 
-{% hint style="warning" %}
-The example below uses UmbracoApiController which is obsolete in Umbraco 14 and will be removed in Umbraco 15.
-{% endhint %}
-
 {% code title="BlockGridTestController.cs" lineNumbers="true" %}
 ```csharp
 using Microsoft.AspNetCore.Mvc;