[Dockerfile] remove uv from docker jax tpu (#7115)

remove uv from docker jax tpu

docker/diffusers-flax-tpu/Dockerfile

@@ -24,7 +24,7 @@ ENV PATH="/opt/venv/bin:$PATH"
 # pre-install the heavy dependencies (these can later be overridden by the deps from setup.py)
 # follow the instructions here: https://cloud.google.com/tpu/docs/run-in-container#train_a_jax_model_in_a_docker_container
 RUN python3 -m pip install --no-cache-dir --upgrade pip uv && \
-    python3 -m uv pip install --no-cache-dir \
+    python3 -m pip install --no-cache-dir \
         "jax[tpu]>=0.2.16,!=0.3.2" \
         -f https://storage.googleapis.com/jax-releases/libtpu_releases.html && \
     python3 -m uv pip install --upgrade --no-cache-dir \