Can individual 'Update' Smart Actions be disabled?

Summary:

Content (required):

I've configured my Opportunity update page which included adding some custom fields. I see my custom fields automatically get 'Update' Smart Actions which are available in the Action Bar when on the detail page.

Is there a way to prevent fields from becoming Update Smart Actions?

Version (include the version you are using, if applicable):

23C Next Gen Sales

Code Snippet (add any code snippets that support your topic, if applicable):