BuddyPress.org

Buddypress by default provide the creating activity on profile uploads.

https://prnt.sc/qg-NDzJP9nll

If you want to add your custom activity as you have given in your code snippet you can use it like this because hook is deprecated.

// Add action to show new avatar in activity stream
function custom_bp_avatar_activity($user_id, $args) {
//…[Read more]

First Go to appearance section click on widgets and remove all widgets from the ” Members Directory Right Sidebar “.
It will remove all widgets from member directory