docs: remove reference to defunct template creation wizard permission feature (#25104)

#11918 took away advanced settings during template creation however it
did not clean up the documentation of a reference to customising the
template permissions during template creation -
https://coder.com/docs/admin/templates/template-permissions

> By default the Everyone group is assigned to each template meaning any
Coder user can use the template to create a workspace. To prevent this,
disable the Allow everyone to use the template setting when creating a
template.

This setting is no longer present in Coder, so removing it from the
docs.

docs/admin/templates/template-permissions.md

@@ -17,7 +17,5 @@ ordinary users for specific templates without granting them the site-wide role
 of `Template Admin`.
 
 By default the `Everyone` group is assigned to each template meaning any Coder
-user can use the template to create a workspace. To prevent this, disable the
-`Allow everyone to use the template` setting when creating a template.
-
-![Create Template Permissions](../../images/templates/create-template-permissions.png)
+user can use the template to create a workspace. This access can be revoked
+via the actions menu button to the right hand side of each group entry.