try to fix failing test

Author: benmccann

packages/kit/src/runtime/server/page/render.js

@@ -151,7 +151,7 @@ export async function render_response({
 				.map((dep) => `\n\t<link${styles.has(dep) ? ' disabled' : ''} rel="stylesheet" href="${options.prefix + dep}">`)
 				.join('');
 
-		if (options.router || page_config.hydrate) {
+		if (page_config.hydrate) {
 			head += Array.from(js)
 				.map((dep) => `\n\t<link rel="modulepreload" href="${options.prefix + dep}">`)
 				.join('');