clean up router utils

src/Umbraco.Web.UI.Client/libs/router/generate-route-path-builder.function.ts

@@ -1,16 +1,7 @@
-import type { ISlashOptions } from '@umbraco-cms/backoffice/router';
+import { stripSlash } from '@umbraco-cms/backoffice/router';
 
 const PARAM_IDENTIFIER = /:([^\\/]+)/g;
 
-function stripSlash(path: string): string {
-	return slashify(path, { start: false, end: false });
-}
-
-function slashify(path: string, { start = true, end = true }: Partial<ISlashOptions> = {}): string {
-	path = start && !path.startsWith('/') ? `/${path}` : !start && path.startsWith('/') ? path.slice(1) : path;
-	return end && !path.endsWith('/') ? `${path}/` : !end && path.endsWith('/') ? path.slice(0, path.length - 1) : path;
-}
-
 export function generateRoutePathBuilder(path: string) {
 	return (params: { [key: string]: string | number }) =>
 		stripSlash(