Update release agent warnings

[alexazl]

Description

Remove an old warning and update another warning to CAUTION, instead of WARNING alert

Reasons

The warning being removed is for a change made long enough ago that customers shouldn't face the issue anymore. The updated alert can be downgraded to CAUTION due to it not impacting customers who are just getting started (which is most customers at this point).

Content Checklist

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Please take a moment to check through the following items when submitting your PR (this is just a guide so will not be relevant for all PRs) 😸:

• [ ] Break up walls of text by adding paragraph breaks.
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