fix: remove partial listing of collections from landing page (stac-utils#496)

**Related Issue(s):**

- stac-utils#495 

**Description:**

Removes the "child" links to collections from the landing page. Since
collection pagination was implemented, an incomplete list of these
"child" links was returned on the landing page. In order to avoid
confusion, it is better to remove this partial listing of collections
from the landing page.

**PR Checklist:**

- [x] Code is formatted and linted (run `pre-commit run --all-files`)
- [x] Tests pass (run `make test`)
- [x] Documentation has been updated to reflect changes, if applicable
- [x] Changes are added to the changelog

---------

Co-authored-by: Jonathan Healy <[email protected]>

Author: StijnCaerts

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 - Removed ENV_MAX_LIMIT environment variable; maximum limits are now handled by the default global limit environment variable. [#482](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/482)
 - Changed the default and maximum pagination limits for collections/items endpoints. [#482](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/482)
+- Removed the `rel=child` links to the collections from the landing page, as the listing was incomplete due to pagination. [#496](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/496)
 
 ### Fixed
 

stac_fastapi/core/stac_fastapi/core/core.py

@@ -201,17 +201,6 @@ async def landing_page(self, **kwargs) -> stac_types.LandingPage:
                 ]
             )
 
-        collections = await self.all_collections(request=kwargs["request"])
-        for collection in collections["collections"]:
-            landing_page["links"].append(
-                {
-                    "rel": Relations.child.value,
-                    "type": MimeTypes.json.value,
-                    "title": collection.get("title") or collection.get("id"),
-                    "href": urljoin(base_url, f"collections/{collection['id']}"),
-                }
-            )
-
         # Add OpenAPI URL
         landing_page["links"].append(
             {