Pin Horovod version (aws#218)

Author: laurenyu

docker/1.13.1/Dockerfile.cpu

@@ -73,15 +73,9 @@ ENV PYTHONDONTWRITEBYTECODE=1 PYTHONUNBUFFERED=1 PYTHONIOENCODING=UTF-8 LANG=C.U
 
 ARG framework_support_installable=sagemaker_tensorflow_container-2.0.0.tar.gz
 COPY $framework_support_installable .
-<<<<<<< HEAD
 ARG TF_URL="https://tensorflow-aws.s3-us-west-2.amazonaws.com/1.13/AmazonLinux/cpu/latest-patch-latest-patch/tensorflow-1.13.1-cp36-cp36m-linux_x86_64.whl"
 
 RUN ${PIP} --no-cache-dir install --upgrade pip setuptools
-=======
-ARG TF_URL="https://s3-us-west-2.amazonaws.com/tensorflow-aws/1.13/AmazonLinux/cpu/latest-patch-s3_testcopy.patch/tensorflow-1.13.1-cp36-cp36m-linux_x86_64.whl"
-
-RUN ${PIP} --no-cache-dir install  --upgrade pip setuptools
->>>>>>> Merge dockerfiles
 
 # Some TF tools expect a "python" binary
 RUN ln -s $(which ${PYTHON}) /usr/local/bin/python
@@ -113,4 +107,4 @@ RUN ${PIP} install --no-cache-dir -U \
 
 ENV SAGEMAKER_TRAINING_MODULE sagemaker_tensorflow_container.training:main
 
-CMD ["bin/bash"]
+CMD ["bin/bash"]