Don't start a goroutine when flushing buffer

buffer.go

@@ -66,7 +66,7 @@ func (b *Buffer) Flush() {
 		return
 	}
 
-	go b.fn(sbuffer)
+	b.fn(sbuffer)
 	b.Clear()
 }
 

buffer_test.go

@@ -34,20 +34,11 @@ func TestAdd(t *testing.T) {
 }
 
 func TestFlush(t *testing.T) {
-	res := make(chan []*influxdb.Series, 1)
-	fn := func(series []*influxdb.Series) { res <- series }
+	fn := func(series []*influxdb.Series) {}
 	b := NewBuffer(1, fn)
 	defer b.Close()
 	b.Add(&influxdb.Series{})
 
-	timer := time.NewTimer(time.Second)
-
-	select {
-	case <-res:
-	case <-timer.C:
-		t.Error("Flushing did not happen")
-	}
-
 	if b.Size() != 0 {
 		t.Error("Flushing buffer does not make it empty again")
 	}