Move JetStream direct APIs to private.

Signed-off-by: Derek Collison <derek@nats.io>

test/leafnode_test.go

@@ -655,20 +655,6 @@ func shutdownCluster(c *cluster) {
 	c.shutdown()
 }
 
-func (c *cluster) randomServer() *server.Server {
-	// Since these can be randomly shutdown in certain tests make sure they are running first.
-	// Copy our servers list and shuffle then walk looking for first running server.
-	cs := append(c.servers[:0:0], c.servers...)
-	rand.Shuffle(len(cs), func(i, j int) { cs[i], cs[j] = cs[j], cs[i] })
-
-	for _, s := range cs {
-		if s.Running() {
-			return s
-		}
-	}
-	return nil
-}
-
 func (c *cluster) totalSubs() int {
 	totalSubs := 0
 	for _, s := range c.servers {