bp_activity_remove_all_user_data( int $user_id )

function bp_activity_remove_all_user_data( $user_id = 0 ) {
	if ( empty( $user_id ) ) {
		return false;
	}

	// Clear the user's activity from the sitewide stream and clear their activity tables.
	bp_activity_delete( array( 'user_id' => $user_id ) );

	// Remove any usermeta.
	bp_delete_user_meta( $user_id, 'bp_latest_update'       );
	bp_delete_user_meta( $user_id, 'bp_favorite_activities' );

	// Execute additional code
	do_action( 'bp_activity_remove_data', $user_id ); // Deprecated! Do not use!

	/**
	 * Fires after the removal of all of a user's activity data.
	 *
	 * @since BuddyPress 1.5.0
	 *
	 * @param int $user_id ID of the user being deleted.
	 */
	do_action( 'bp_activity_remove_all_user_data', $user_id );
}