Fix: Moved ubuntu:trusty image download to Jenkins config
diff --git a/utils/docker/Dockerfile b/utils/docker/Dockerfile
index 47b0ed0..2c1bda6 100644
--- a/utils/docker/Dockerfile
+++ b/utils/docker/Dockerfile
@@ -12,9 +12,6 @@
 WORKDIR /son-emu
 COPY . /son-emu/
 
-# ensure that we have the right docker image for tests available
-RUN docker run --rm ubuntu:trusty
-
 RUN cd /son-emu/ansible \
     && ansible-playbook install.yml \
     && cd /son-emu \