nuke flow cache module loading from floodlightdefault

src/main/resources/floodlightdefault.properties

@@ -8,7 +8,6 @@ net.floodlightcontroller.firewall.Firewall,\
 net.floodlightcontroller.forwarding.Forwarding,\
 net.floodlightcontroller.linkdiscovery.internal.LinkDiscoveryManager, \
 net.floodlightcontroller.topology.TopologyManager, \
-net.floodlightcontroller.flowcache.FlowCache, \
 net.floodlightcontroller.flowcache.FlowReconcileManager, \
 net.floodlightcontroller.jython.JythonDebugInterface,\
 net.floodlightcontroller.counter.CounterStore,\