fixing centos8 docker (#916)

Co-authored-by: DvirDukhan <dvir@redislabs.com>

Author: chayim

opt/build/docker/dockerfile.tmpl

@@ -37,7 +37,6 @@ COPY --from=redis /usr/local/ /usr/local/
 COPY ./opt/ opt/
 ADD ./tests/flow/ tests/flow/
 
-RUN ./opt/readies/bin/getupdates
 RUN if [ ! -z $(command -v apt-get) ]; then apt-get -qq update; apt-get -q install -y git; fi
 RUN if [ ! -z $(command -v yum) ]; then yum install -y git; fi
 RUN FORCE=1 ./opt/readies/bin/getpy3