Remove custom fields write panel

Hey Guys

I am using Flutter to manage some custom fields for a real estate WP website.

As such there are a lot of custom fields for each post (property).

When you click Edit on a property, you can see each of these repeated in both the Standard WP Custom Fields panel but also in the Flutter write panels.

Is there anyway to disable, hide the standard WP Custom Fields panel from my administrators?

I could hack the CSS to hide it, but is there a more sophisticated option?

Thanks!