WP_Post_Type::remove_rewrite_rules

	 * @global array      $post_type_meta_caps Used to remove meta capabilities.
	 */
	public function remove_rewrite_rules() {
		global $wp, $wp_rewrite, $post_type_meta_caps;

		// Remove query var.
		if ( false !== $this->query_var ) {
			$wp->remove_query_var( $this->query_var );
		}

		// Remove any rewrite rules, permastructs, and rules.
		if ( false !== $this->rewrite ) {
			remove_rewrite_tag( "%$this->name%" );
			remove_permastruct( $this->name );
			foreach ( $wp_rewrite->extra_rules_top as $regex => $query ) {
				if ( false !== strpos( $query, "index.php?post_type=$this->name" ) ) {
					unset( $wp_rewrite->extra_rules_top[ $regex ] );
				}
			}
		}

		// Remove registered custom meta capabilities.
		foreach ( $this->cap as $cap ) {
			unset( $post_type_meta_caps[ $cap ] );