Remove a Post Type from the Search Results

add_action( 'pre_get_posts', 'remove_post_type_from_front_end_search_results');

function remove_post_type_from_front_end_search_results($query){

    if(is_admin() || !$query->is_main_query()) return;
	
    if($query->is_search()){

        $post_type_to_remove = 'your_post_type';
        $searchable_post_types = get_post_types(array('exclude_from_search' => false));

        if(is_array($searchable_post_types) && in_array($post_type_to_remove, $searchable_post_types)){
            unset( $searchable_post_types[ $post_type_to_remove ] );
            $query->set('your_post_type', $searchable_post_types);
        }
    }
}