public function delete_course_content() {
		global $wpdb;
		$post_id = (int) dozent_input_text( 'item_id' );

		do_action( 'dozent/delete_course_content/before', $post_id );

		wp_delete_post( $post_id, true );
		$wpdb->delete( $wpdb->postmeta, [ 'post_id' => $post_id ] );
		do_action( 'dozent/delete_course_content/after', $post_id );
	}