refactor(pages): remove fixed hero group from Pages collection

Hero content is now handled via HeroBlock/HeroSliderBlock in the
flexible layout blocks system, giving editors full control.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/collections/Pages.ts

@@ -76,27 +76,6 @@ export const Pages: CollectionConfig = {
         description: 'URL-Pfad (z.B. "ueber-uns" / "about-us")',
       },
     },
-    {
-      name: 'hero',
-      type: 'group',
-      fields: [
-        {
-          name: 'image',
-          type: 'upload',
-          relationTo: 'media',
-        },
-        {
-          name: 'headline',
-          type: 'text',
-          localized: true,
-        },
-        {
-          name: 'subline',
-          type: 'textarea',
-          localized: true,
-        },
-      ],
-    },
     {
       name: 'layout',
       type: 'blocks',