Revert "Attempt to fix "Attestation generation failure" from CI"

This reverts commit 762339e.

It didn't end up fixing CI, and the documentation does not explicitly
mention it as a requirement anyway.

Author: caleb531

.github/workflows/publish.yml

@@ -15,7 +15,6 @@ jobs:
     environment: release
     permissions:
       id-token: write
-      attestations: write
 
     steps:
     - uses: actions/checkout@v3