You can uninstall the AWS IoT integration for The Things Stack using AWS CloudFormation.
Delete AWS CloudFormation Stack
In the AWS Console, open Services and go to CloudFormation.
In the list of stacks, go to the stack that you created when deploying the integration. See Deployment Guide.
In the top-right, click Delete.
Double check that you are deleting the right AWS CloudFormation stack. Proceed with Delete stack.
Note:
Deleting all resources may take a few minutes.When the stack is deleted, the AWS CloudFormation stack disappears from the list.