Remove outlines from dockerfile

Author: WoosukKwon

Dockerfile.tpu

@@ -15,9 +15,4 @@ COPY . /workspace/vllm
 ENV VLLM_TARGET_DEVICE="tpu"
 RUN cd /workspace/vllm && python setup.py develop
 
-# Re-install outlines to avoid dependency errors.
-# The outlines version must follow requirements-common.txt.
-RUN pip uninstall outlines -y
-RUN pip install "outlines>=0.0.43"
-
 CMD ["/bin/bash"]