Remove JMX support from ARQ

ARQ has some JMX support but JMX is unavailable in verions environments (some OSGi (glassfish), Google App engine, systems using classloader restrictions (ant).

If JMX can't be started, ARQ operates as normal, but without the static information (e.g. versions) and live query counts.

The proposal is to remove JMX from ARQ on the assumption that, as a library, such information is better obtained by the using application.

One such system might be Fuseki which already has a management information framework (it exposes statistics over HTTP).