Hello,
To remove the button of the call to action section, this feature is not available through the customize section. But by following the path Admin Panel > Appearance > Additional CSS, you can get the desired section.
.cta-buttons {
display: none;
}
#front-page-home-sections .home-section-call-to-action {
padding: 60px 0;
}
By this CSS you can remove the button and arrow from the section.
Hope this helps.
If you have further queries, let us know.
Thank you.