Remove precache in favour of just pulling by default

registry.go

@@ -473,12 +473,10 @@ func (r *rtr) start() error {
 		return nil
 	}
 
-	if r.options.Precache {
 	// add all local service routes into the routing table
 	if err := r.manageRegistryRoutes(r.options.Registry, "create"); err != nil {
 		return fmt.Errorf("failed adding registry routes: %s", err)
 	}
-	}
 
 	// add default gateway into routing table
 	if r.options.Gateway != "" {