remove_avatar

if ( !empty( $_POST['avatar_id'] )  && $_POST['avatar_id'] != get_user_meta($current_user->id, 'custom_avatar', true) && empty( $_POST['remove_avatar'])){
		update_user_meta( $current_user->id, 'custom_avatar', esc_attr( $_POST['avatar_id'] ) );
	}elseif( !empty( $_POST['remove_avatar']) && $_POST['remove_avatar'] == 1){
		update_user_meta( $current_user->id, 'custom_avatar', '-1' );
	}