BuddyPress.org

hi,

there is no filter for the search UI (members and groups), the only why is to remove the function call in the template or to use css.

the template file :
buddypress\bp-templates\bp-legacy\buddypress\groups\index.php
just comment bp_directory_groups_search_form();

or add this css code :

#group-dir-search{
   display: none;
}

#members-dir-search{
   display: none; 
}