Remove notify to non-existent handler

[JimMadge]

✅ Checklist

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🚦 Depends on

⤴️ Summary

🌂 Related issues

Closes #2120

🔬 Tests

[jemrobinson]

LGTM as long as we're sure we don't need this handler

[github-actions]

Coverage report

This PR does not seem to contain any modification to coverable code.

[JimMadge]

LGTM as long as we're sure we don't need this handler

Yes I'm fairly certain. I think it was trying to do the same as adding the pam_mkhomedir.so mnodule. It didn't add any rules that we didn't already have.
I think before the cloud-init used a mixture of editing pam.d files and using the command line tool.
Now we can use the Ansible module.