remove grpc extensions section

Author: devalog

fern/docs.yml

@@ -632,6 +632,6 @@ redirects:
   - source: /learn/api-definitions/openrpc/extensions/others
     destination: /learn/api-definitions/openrpc/extensions/overview
     permanent: true
-  - source: /learn/api-definitions/grpc/extensions/others
-    destination: /learn/api-definitions/grpc/extensions/overview
+  - source: /learn/api-definitions/grpc/extensions/:slug*
+    destination: /learn/api-definitions/overview/overrides#definition-specific-extensions
     permanent: true

fern/products/api-def/api-def.yml

@@ -211,44 +211,6 @@ navigation:
           - page: Error handling
             path: ./grpc-pages/services/errors.mdx
             slug: errors
-      - section: Extensions
-        slug: extensions
-        contents:
-          - page: Overview
-            path: ./grpc-pages/extensions/overview.md
-          - page: Audiences
-            path: ./grpc-pages/extensions/audiences.mdx
-          - page: Availability
-            path: ./grpc-pages/extensions/availability.mdx
-          - page: Base path
-            path: ./grpc-pages/extensions/base-path.mdx
-          - page: Error handling
-            path: ./grpc-pages/extensions/error-handling.mdx
-          - page: Request + response examples
-            path: ./grpc-pages/extensions/examples.mdx
-          - page: Ignoring elements
-            path: ./grpc-pages/extensions/ignore.mdx
-          - page: SDK method names
-            path: ./grpc-pages/extensions/method-names.mdx
-            slug: method-names
-          - page: Pagination
-            path: ./grpc-pages/extensions/pagination.mdx
-          - page: Parameter names
-            path: ./grpc-pages/extensions/parameter-names.mdx
-          - page: Retry behavior
-            path: ./grpc-pages/extensions/retry.mdx
-          - page: SDK group names
-            path: ./grpc-pages/extensions/sdk-group-name.mdx
-          - page: Server names
-            path: ./grpc-pages/extensions/server-name.mdx
-          - page: Streaming operations
-            path: ./grpc-pages/extensions/streaming.mdx
-          - page: Timeout settings
-            path: ./grpc-pages/extensions/timeout.mdx
-          - page: Union naming
-            path: ./grpc-pages/extensions/union-naming.mdx
-          - page: Validation
-            path: ./grpc-pages/extensions/validation.mdx
   - section: Fern Definition
     collapsed: true
     slug: ferndef