Add OpenAPI

Author: Rick-Anderson

aspnetcore/release-notes/aspnetcore-10.0.md

@@ -33,53 +33,6 @@ This section describes new features for minimal APIs.
 
 This section describes new features for OpenAPI.
 
-### Breaking changes
-
-Support for OpenAPI 3.1 requires an update to the underlying OpenAPI.NET library to a new major version, 2.0.
-This new version has some breaking changes from the previous version, and this may impact your applications
-if you have any document, operation, or schema transformers.
-Perhaps the most significant change is that the `OpenApiAny` class has been dropped in favor of using `JsonNode` directly.
-If your transformers use `OpenApiAny`, you will need to update them to use `JsonNode` instead.
-For example, a schema transformer to add an example in .NET 9 might look like this:
-
-```csharp
-    options.AddSchemaTransformer((schema, context, cancellationToken) =>
-    {
-        if (context.JsonTypeInfo.Type == typeof(WeatherForecast))
-        {
-            schema.Example = new OpenApiObject
-            {
-                ["date"] = new OpenApiString(DateTime.Now.AddDays(1).ToString("yyyy-MM-dd")),
-                ["temperatureC"] = new OpenApiInteger(0),
-                ["temperatureF"] = new OpenApiInteger(32),
-                ["summary"] = new OpenApiString("Bracing"),
-            };
-        }
-        return Task.CompletedTask;
-    });
-```
-
-In .NET 10 the transformer to do the same task will look like this:
-
-```csharp
-    options.AddSchemaTransformer((schema, context, cancellationToken) =>
-    {
-        if (context.JsonTypeInfo.Type == typeof(WeatherForecast))
-        {
-            schema.Example = new JsonObject
-            {
-                ["date"] = DateTime.Now.AddDays(1).ToString("yyyy-MM-dd"),
-                ["temperatureC"] = 0,
-                ["temperatureF"] = 32,
-                ["summary"] = "Bracing",
-            };
-        }
-        return Task.CompletedTask;
-    });
-```
-
-Note that these changes will be necessary even if you congfigure the OpenAPI version to 3.0.
-
 ## Authentication and authorization
 
 This section describes new features for authentication and authorization.