docs: remove redirect to absent page

Author: d-v-b

mkdocs.yml

@@ -217,7 +217,6 @@ plugins:
         'developers/contributing.html.md': 'contributing.md'
         'developers/index.html.md': 'contributing.md'
         'developers/roadmap.html.md': 'https://zarr.readthedocs.io/en/v3.0.8/developers/roadmap.html'
-        'api/zarr/creation.md': 'api/zarr/deprecated/creation.md'
         'api.md': 'api/zarr/index.md'
         'api/zarr/metadata/migrate_v3.md': 'api/zarr/metadata.md'