Deleting serverless project results in error

[lucasklaassen]

If you create a serverless project and add this plugin, then deploy both the serverless application and the client side S3 cloud bucket and then try and remove the serverless project:
sls remove it will result in the following error:

 An error occurred while provisioning your stack: S3BucketFrontEnd - The bucket you tried to delete is not empty.

[sdd]

Sounds like we need to add remove hooks to clear the bucket. Any PRs welcome - I will not have chance to look at this for a few days.