Yes, you can add the following CSS code to your active theme’s Custom CSS file (Usually style.css or custom.css):
#affwp-affiliate-dashboard-invites .affwp-invites-aff-invite-code-header, #affwp-affiliate-dashboard-invites .affwp-invites-aff-invite-code, #affwp-affiliate-dashboard-invites .affwp-invites-aff-invite-code-message {
display: none;
}