platform: Refactoring libbox to use gRPC-based protocol

experimental/libbox/platform.go

@@ -10,7 +10,6 @@ type PlatformInterface interface {
 	UsePlatformAutoDetectInterfaceControl() bool
 	AutoDetectInterfaceControl(fd int32) error
 	OpenTun(options TunOptions) (int32, error)
-	WriteLog(message string)
 	UseProcFS() bool
 	FindConnectionOwner(ipProtocol int32, sourceAddress string, sourcePort int32, destinationAddress string, destinationPort int32) (int32, error)
 	PackageNameByUid(uid int32) (string, error)
@@ -26,11 +25,6 @@ type PlatformInterface interface {
 	SendNotification(notification *Notification) error
 }
 
-type TunInterface interface {
-	FileDescriptor() int32
-	Close() error
-}
-
 type InterfaceUpdateListener interface {
 	UpdateDefaultInterface(interfaceName string, interfaceIndex int32, isExpensive bool, isConstrained bool)
 }