We're using AWS Step Functions to wait for build jobs on AWS CodeBuild to complete. Since github-codebuild-integration has built from the context of Serverless Architecture, it should be replaced with Amazon CloudWatch Events to treat build job as an "event" not a status.

To achieve that:

• Remove AWS Step Functions stuffs from the code and the CloudFormation template
• Invoke build-result-notifier Lambda function by CloudWatch Events which is associated with CodeBuild project's status changing