Remove legacy ToolHive registry schema reference (#871)

The legacy ToolHive registry format is being retired. Coordinated PRs
in stacklok/toolhive-core and stacklok/toolhive remove the schema file
and stop publishing it as a release asset; once that lands the mirror
here would fail. Drop the mirror entry, the cached schema, the
reference page, and all links to it.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: rdimitrov

.github/upstream-projects.yaml

@@ -60,8 +60,6 @@ projects:
       # toolhive-core schemas re-exported by toolhive at release time
       # (see stacklok/toolhive#4982). Previously downloaded from the
       # toolhive-core repo via a go.mod-derived version lookup.
-      - release_asset: toolhive-legacy-registry.schema.json
-        destination: static/api-specs/toolhive-legacy-registry.schema.json
       - release_asset: upstream-registry.schema.json
         destination: static/api-specs/upstream-registry.schema.json
       - release_asset: publisher-provided.schema.json

docs/toolhive/guides-cli/registry.mdx

@@ -144,10 +144,9 @@ ToolHive supports two types of custom registries:
 
 :::warning[Legacy format no longer accepted]
 
-The legacy
-[ToolHive-native registry format](../reference/registry-schema-toolhive.mdx) is
-no longer accepted by `thv config set-registry` or by remote registries. To
-migrate an existing custom registry file, run
+The legacy ToolHive-native registry format is no longer accepted by
+`thv config set-registry` or by remote registries. To migrate an existing custom
+registry file, run
 [`thv registry convert`](../reference/cli/thv_registry_convert.md):
 
 ```bash

docs/toolhive/reference/index.mdx

@@ -77,14 +77,4 @@ tutorials, see the individual product sections.
   }}
 />
 
-<DocCard
-  item={{
-    type: 'link',
-    href: '/toolhive/reference/registry-schema-toolhive',
-    label: 'ToolHive registry JSON schema (legacy)',
-    description:
-      'Reference for the legacy ToolHive registry format, which is no longer accepted; migrate with `thv registry convert`.',
-  }}
-/>
-
 </div>

docs/toolhive/reference/registry-schema-toolhive.mdx

@@ -27,8 +27,7 @@ needs `"servers": []`.
 :::info
 
 The CLI, UI, and [Registry Server](/toolhive/guides-registry/intro) all consume
-this upstream format. The legacy
-[ToolHive-native registry format](./registry-schema-toolhive.mdx) is no longer
+this upstream format. The legacy ToolHive-native registry format is no longer
 accepted by `thv config set-registry` or by remote registries; migrate any
 existing custom registry file with
 [`thv registry convert`](./cli/thv_registry_convert.md).

docs/toolhive/reference/registry-schema-upstream.mdx

@@ -303,10 +303,6 @@ const config: Config = {
               label: 'ToolHive Registry Server API',
               to: 'toolhive/reference/registry-api',
             },
-            {
-              label: 'ToolHive registry schema',
-              to: 'toolhive/reference/registry-schema-toolhive',
-            },
             {
               label: 'Upstream registry schema',
               to: 'toolhive/reference/registry-schema-upstream',

docusaurus.config.ts

@@ -258,7 +258,6 @@ const sidebars: SidebarsConfig = {
         'toolhive/guides-registry/telemetry-metrics',
         'toolhive/reference/registry-api',
         'toolhive/reference/registry-schema-upstream',
-        'toolhive/reference/registry-schema-toolhive',
       ],
     },