I was able to hide it using the following code in the Page Header Code Injection of wherever the newsletter sign up form is.
<style>
.newsletter-form-footnote {
display: none !important;
}
</style>
Hopefully that helps most of you out!
As a bonus, this also happened to make the UGLY sticky reCAPTCHA logo disappear that was showing up on the right hand side of my websites.
Oh, and as a sidenote, this will make ANY of the footnote text disappear in your newsletter form, so hopefully you can live without that for now during this weird time in the world of Squarespace 🤪