Remove half-truth re: building URLs for objects in the webroot

Author: AugustMiller

docs/4.x/directory-structure.md

@@ -68,8 +68,6 @@ Configuration
 Purpose
 : This directory represents your server’s web root. The public `index.php` file lives here, alongside your static images, stylesheets, and JavaScript files.
 
-  You can generate a URL to a file in this folder with Twig’s [`siteUrl()` function](./dev/functions.md#siteurl).
-
 Customization
 : [`CRAFT_WEB_ROOT`](./config/README.md#craft-web-root) <Since ver="4.3.0" feature="Customizing the web root via environment override" /> — This is primarily used to set the [`@webroot` alias](./config/README.md#aliases).
 

docs/5.x/system/directory-structure.md

@@ -66,8 +66,6 @@ Configuration
 Purpose
 : This directory represents your server’s web root. The public `index.php` file lives here, alongside your static images, stylesheets, and JavaScript files.
 
-  You can generate a URL to a file in this folder with Twig’s [`siteUrl()` function](../reference/twig/functions.md#siteurl).
-
 Customization
 : [`CRAFT_WEB_ROOT`](../reference/config/bootstrap.md#craft-web-root) — This is primarily used to set the [`@webroot` alias](../configure.md#aliases).