transformers

cf271730 - Inline GGUF spawn into GGUFQuantizer; drop spawn_gguf_materialize

Inline GGUF spawn into GGUFQuantizer; drop spawn_gguf_materialize Keeps the diff against `main` smaller: the GGUF-specific spawn logic lives in `GGUFQuantizer.spawn_materialize` (the only caller) instead of a separate top-level helper in `core_model_loading`.