Fix: Removed more zeromq dependencies.

Signed-off-by: Manuel Peuster <manuel@peuster.de>
diff --git a/utils/docker/Dockerfile b/utils/docker/Dockerfile
index 1614793..0dbdd94 100755
--- a/utils/docker/Dockerfile
+++ b/utils/docker/Dockerfile
@@ -51,7 +51,7 @@
 
 # install son-emu
 RUN echo 'install son-emu'
-RUN apt-get install -y  python-dev python-zmq libzmq-dev libffi-dev libssl-dev
+RUN apt-get install -y  python-dev libffi-dev libssl-dev
 RUN pip install -U tabulate argparse networkx six ryu oslo.config pytest Flask flask_restful requests prometheus_client pyaml
 WORKDIR /
 #avoid pulling not the latest git, copy the current dir, to run this from Jenkins