[INFRA] Minor follow-up for PR #11482, remove SPARK_HOME setting from cudf docker build (#11490)

The SPARK_HOME was set with nonexistent directory. It seems not really used.

Follow-up for #11482.

Author: PHILO-HE

dev/docker/cudf/Dockerfile

@@ -16,24 +16,21 @@
 #
 
 FROM ghcr.io/facebookincubator/velox-dev:adapters
-ENV SPARK_HOME=/opt/spark-3.4.4-bin-hadoop3
-ENV PATH=$SPARK_HOME/bin:$PATH
 ENV CUDA_ARCHITECTURES=70
 ENV LD_LIBRARY_PATH=/opt/gluten/ep/build-velox/build/velox_ep/_build/release/_deps/curl-build/lib:$LD_LIBRARY_PATH
 
 
 RUN yum install -y sudo patch maven perl && \
     dnf remove -y cuda-toolkit-12* && dnf install -y cuda-toolkit-13-1; \
     dnf autoremove -y && dnf clean all; \
+    rm -rf /opt/rh/gcc-toolset-12 && ln -s /opt/rh/gcc-toolset-14 /opt/rh/gcc-toolset-12; \
     ln -sf /usr/local/bin/cmake /usr/bin && \
     git clone --depth=1 https://github.com/apache/incubator-gluten /opt/gluten && \
     cd /opt/gluten/.github/workflows/util/ && \
-    ./install-spark-resources.sh 3.4 && \
     cd /opt/gluten && \
     source /opt/rh/gcc-toolset-14/enable && \
     bash ./dev/buildbundle-veloxbe.sh --run_setup_script=OFF --build_arrow=ON --spark_version=3.4 --build_tests=ON --build_benchmarks=ON --enable_gpu=ON && \
     rm -rf /opt/gluten && \
-    rm -rf /opt/spark-3.4.4-bin-hadoop3 && \
     rm -rf /root/.cache/ccache