fix: drop the removed hf extra from the Dockerfile install step

The optional dependency group named hf no longer exists in pyproject so uv was refusing to sync with extra hf. Transformers and torch are now part of the default dependency set so a plain sync is enough.

Dockerfile

@@ -8,8 +8,6 @@ RUN npm run build
 
 FROM python:3.12-slim-bookworm
 
-ARG INSTALL_HF=1
-
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1 \
     PYTHONPATH=/app \
@@ -18,8 +16,7 @@ ENV PYTHONDONTWRITEBYTECODE=1 \
     TRANSFORMERS_CACHE=/tmp/hf_cache \
     MODEL_NAME="Meta-Feature Stacking (Production)" \
     ENV=production \
-    PORT=8000 \
-    INSTALL_HF=${INSTALL_HF}
+    PORT=8000
 
 WORKDIR /app
 
@@ -30,11 +27,7 @@ RUN apt-get update \
 COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
 
 COPY pyproject.toml uv.lock* README.md ./
-RUN if [ "$INSTALL_HF" = "1" ]; then \
-      uv sync --frozen --no-dev --extra hf 2>/dev/null || uv sync --no-dev --extra hf; \
-    else \
-      uv sync --frozen --no-dev 2>/dev/null || uv sync --no-dev; \
-    fi
+RUN uv sync --frozen --no-dev 2>/dev/null || uv sync --no-dev
 
 RUN uv run python -m spacy download en_core_web_sm \
     && uv run python - <<'PY'