fixed deprecated rand usage

ntree_test.go

@@ -5,16 +5,10 @@ import (
 	"runtime"
 	"sync"
 	"testing"
-	"time"
 )
 
 var wg sync.WaitGroup
 
-func init() {
-	// Use different values every test to try and catch edge cases.
-	rand.Seed(time.Now().Unix())
-}
-
 func TestInit(t *testing.T) {
 	// test all available dimensional combinations
 	for n := 1; n <= MaxN; n++ {