I have removed the activemq, activemq-broker and activemq-client features from features.xml. I had one more problem after this change. ServiceMix hung after the first start. I had to kill it and start again. After the next start the I have mentioned another problem - log:display has displayed nothing.
I have replaced the activemq-broker by activemq-broker-noweb in featuresBoot and it has solved my problem. I think, there is no reason to install activemq-web-console at boot. If one needs the console, it can be installed manually. From the same reason the patch replaces the dependency to activemq-broker by dependency to activemq-broker-noweb in other servicemix features.