WPMU DEV BUDDYPRESS HIDE WIDGETS Plugin
Set specific BuddyPress widgets to be available for use only on your network’s main site.
WPMU DEV BUDDYPRESS HIDE WIDGETS Plugin lets you make specific BuddyPress widgets available only on your network’s main site.
Control where BuddyPress widgets can display and limit plugin access to super admins only. Reserve built-in BuddyPress widgets for your main site and establish it as the network hub.
Please visit official plugin page for more information