Remove redundant storage-buckets entry from toctree (#2314)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: mishig25

docs/hub/_toctree.yml

@@ -420,8 +420,6 @@
   new: true
   isExpanded: true
   sections:
-  - local: storage-buckets # TODO link to #buckets-vs-repositories
-    title: Buckets vs Git Repositories
   - local: storage-buckets-security
     title: Bucket Security