chore: update CHANGELOG.v2.alpha.md

CHANGELOG.v2.alpha.md

@@ -9,13 +9,6 @@ All notable changes to this project will be documented in this file. See [standa
 
 * **kinesisfirehose-alpha:** replaced `destinations` property with `destination` (singular) and changed the type from array of Destinations to a single Destination. Old behaviour would only allow an array with a single Destination to be passed in anyway.
 
-### Description of how you validated changes
-
-unit tests + no integ snapshot changes. 
-
-### Checklist
-- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)
-
 ### Features
 
 * **iot-alpha:** support for account audit configuration ([#31661](https://github.com/aws/aws-cdk/issues/31661)) ([fc19571](https://github.com/aws/aws-cdk/commit/fc19571c6392e905ff03998d0e8bc4e3b01399f4)), closes [#31663](https://github.com/aws/aws-cdk/issues/31663)