docs: fix documentation review issues (#110)

- Remove false footer claim from versioning.md (footer was never implemented)
- Add object-store-configuration.md to mkdocs.yaml nav
- Delete orphaned platform.md (nav intentionally links to external sign-up page)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: MilagrosMarin

mkdocs.yaml

@@ -102,6 +102,7 @@ nav:
               - Data Manipulation: reference/specs/data-manipulation.md
               - AutoPopulate: reference/specs/autopopulate.md
               - Job Metadata: reference/specs/job-metadata.md
+              - Object Store Configuration: reference/specs/object-store-configuration.md
       - Configuration: reference/configuration.md
       - Definition Syntax: reference/definition-syntax.md
       - Operators: reference/operators.md

src/about/platform.md

@@ -16,8 +16,6 @@ If you're using legacy DataJoint (version 0.14.x or earlier), please visit the [
 
 **Site-wide banner:** Every page displays a banner indicating you're viewing documentation for DataJoint 2.0+, with a link to the migration guide for legacy users.
 
-**Footer:** The footer shows which version of DataJoint this documentation covers.
-
 ### Feature-Level Indicators
 
 Version admonitions are used for features introduced **after 2.0** (i.e., version 2.1 and later):