Hi,
Add this css code in 8theme optons >> styling >> custom css >> global custom css
.top-bar.topbar-color-dark .topbar-widget.etheme_widget_socials .et-follow-buttons
a, .topbar-widget.etheme_widget_socials .et-follow-buttons a:first-child, .top-bar.topbar-color-dark .topbar-widget.etheme_widget_socials .et-follow-buttons a:last-child { border: 0; }