Remove warning for lack of signing key in dev

[jpwilliams]

Summary

Removes the warning for the lack of a signing key in dev.

Checklist

• [ ] Added a docs PR that references this PR N/A
• [ ] Added unit/integration tests N/A
• [x] Added changesets if applicable

Related

• 356

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 05d60051ed71f55833b8c22ba3339c79eaa89f6f

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ------- | ----- | | inngest | Patch |

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