Reduce exported surface area of ETW package

internal/etw/sample/sample.go

@@ -36,7 +36,6 @@ func main() {
 	fmt.Println("Press enter to log events")
 	reader.ReadString('\n')
 
-	// Write using high-level API.
 	if err := provider.WriteEvent(
 		"TestEvent",
 		etw.WithEventOpts(
@@ -60,32 +59,4 @@ func main() {
 		logrus.Error(err)
 		return
 	}
-
-	// Write using low-level API.
-	descriptor := etw.NewEventDescriptor()
-	descriptor.Level = etw.LevelInfo
-	descriptor.Keyword = 0x140
-	em := &etw.EventMetadata{}
-	ed := &etw.EventData{}
-	em.WriteEventHeader("TestEvent", 0)
-	em.WriteField("TestField", etw.InTypeANSIString, etw.OutTypeUTF8, 0)
-	ed.WriteString("Foo")
-	em.WriteField("TestField2", etw.InTypeANSIString, etw.OutTypeUTF8, 0)
-	ed.WriteString("Bar")
-	em.WriteStruct("TestStruct", 2, 0)
-	em.WriteField("Field1", etw.InTypeANSIString, etw.OutTypeUTF8, 0)
-	ed.WriteString("Value1")
-	em.WriteField("Field2", etw.InTypeANSIString, etw.OutTypeUTF8, 0)
-	ed.WriteString("Value2")
-	em.WriteArray("TestArray", etw.InTypeANSIString, etw.OutTypeDefault, 0)
-	ed.WriteUint16(5)
-	ed.WriteString("Item1")
-	ed.WriteString("Item2")
-	ed.WriteString("Item3")
-	ed.WriteString("Item4")
-	ed.WriteString("Item5")
-	if err := provider.WriteEventRaw(descriptor, nil, nil, [][]byte{em.Bytes()}, [][]byte{ed.Bytes()}); err != nil {
-		logrus.Error(err)
-		return
-	}
 }