Don't install saithrift

Author: pavel-shirshov

dockers/docker-ptf/Dockerfile

@@ -39,11 +39,6 @@ RUN sed --in-place 's/httpredir.debian.org/debian-archive.trafficmanager.net/' /
     && dpkg_apt /root/deps/python-ptf_*.deb \
     && dpkg_apt /root/deps/libthrift-0.9.2_*.deb \
     && dpkg_apt /root/deps/python-thrift_*.deb \
-    && cd /root/deps \
-    && tar xvfz saithrift-0.9.tar.gz \
-    && cd saithrift-0.9 \
-    && python setup.py install \
-    && cd \
     && rm -rf /root/deps \
     && apt-get -y autoclean \
     && apt-get -y autoremove \