General approach:
use the f12 dev tools in your browser to INSPECT the element.
find the hierarchy, and use extra.css template to set it to display: none;
Code:
.memberHeader--withBanner .memberHeader-blurbContainer span {display:none}
should do it.
Now, be sure to check other pages as some css may be used on multiple pages, at which point you'd need to go and add a parent element at the beginning to differentiate it more