cleanup dockerfile

tools/aws_benchmarking/server/Dockerfile

@@ -1,9 +1,6 @@
-# A image for building paddle binaries
-# Use cuda devel base image for both cpu and gpu environment
 FROM python:2.7.14-stretch
 
 ENV HOME /root
-# Add bash enhancements
 COPY ./ /root/
 WORKDIR /root
 RUN pip install -r /root/requirements.txt