fix: remove unused policies in integ test

[aaythapa]

Issue #, if available

N/A

Description of changes

We're having some issues with deploying this template in a new region. We suspect the issue is the added the policies. Removing them here and re-deploying in the region to see if that fixes the issue

Description of how you validated changes

Checklist

• [ ] Adheres to the development guidelines
• [ ] Add/update transform tests
  • [ ] Using correct values
  • [ ] Using wrong values
• [ ] Add/update integration tests

Examples?

Please reach out in the comments if you want to add an example. Examples will be added to sam init through aws/aws-sam-cli-app-templates.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.