fix: review comment

Author: tstephen-nhs

.github/instructions/languages/cdk.instructions.md

@@ -96,7 +96,6 @@ export class CptsApiAppStack extends Stack {
 - Keep assertions light-touch and stable, such as resource counts and a small number of important properties.
 - Avoid mocking AWS resources or writing tests that attempt to exercise live AWS behaviour.
 - CDK constructs suitable for reuse should be placed in `eps-cdk-utils` repo.
-- Smaller CDK constructs may be included here and should have associated tests.
 - Do not test AWS implementation details owned by the CDK library. Test the resources and properties your code is responsible for declaring.
 
 ### Recommended Test Styles