fix golint issues

core/syncx/cond_test.go

@@ -67,7 +67,3 @@ func TestSignalNoWait(t *testing.T) {
 func sleep(millisecond int) {
 	time.Sleep(time.Duration(millisecond) * time.Millisecond)
 }
-
-func currentTimeMillis() int64 {
-	return time.Now().UnixNano() / int64(time.Millisecond)
-}

core/syncx/sharedcalls_test.go

@@ -95,7 +95,8 @@ func TestExclusiveCallDoDiffDupSuppress(t *testing.T) {
 	close(broadcast)
 	wg.Wait()
 
-	if got := atomic.LoadInt32(&calls); got != 5 {	// five letters
+	if got := atomic.LoadInt32(&calls); got != 5 {
+		// five letters
 		t.Errorf("number of calls = %d; want 5", got)
 	}
 }