chore: remove validation schema script

The generator validates the generated schemas already.

Signed-off-by: Sébastien Han <seb@redhat.com>

.pre-commit-config.yaml

@@ -115,15 +115,6 @@ repos:
         pass_filenames: false
         require_serial: true
         files: ^src/llama_stack/apis/
-      - id: openapi-validate
-        name: OpenAPI Schema Validation
-        additional_dependencies:
-          - uv==0.7.8
-        entry: uv run scripts/validate_openapi.py docs/static/ --quiet
-        language: python
-        pass_filenames: false
-        require_serial: true
-        files: ^docs/static/.*\.ya?ml$
       - id: check-workflows-use-hashes
         name: Check GitHub Actions use SHA-pinned actions
         entry: ./scripts/check-workflows-use-hashes.sh