serverless remove hook will properly delete all keys in the frontend bucket; trigger stack delete for the frontend stack; and will allow you to fully remove your backend stack. However if you go into the AWS CloudFormation console, the frontend stack will say DELETE_FAILED due to the bucket you are trying to delete is not empty.
serverless removehook will properly delete all keys in the frontend bucket; trigger stack delete for the frontend stack; and will allow you to fully remove your backend stack. However if you go into the AWS CloudFormation console, the frontend stack will sayDELETE_FAILEDdue to the bucket you are trying to delete is not empty.