chore: removing not-ready-for-use banner (#69)

_By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license_

Author: voho

README.md

@@ -1,7 +1,5 @@
 # CDK Monitoring Constructs
 
-⚠️ This package isn't ready for use yet! ⚠️
-
 [![Gitpod Ready-to-Code](https://img.shields.io/badge/Gitpod-ready--to--code-blue?logo=gitpod)](https://gitpod.io/#https://github.com/cdklabs/cdk-monitoring-constructs)
 [![NPM version](https://badge.fury.io/js/cdk-monitoring-constructs.svg)](https://badge.fury.io/js/cdk-monitoring-constructs)
 [![PyPI version](https://badge.fury.io/py/cdk-monitoring-constructs.svg)](https://badge.fury.io/py/cdk-monitoring-constructs)