protobuf: tun.proto -- Drop unused import

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

protobuf/tun.proto

 import "opts.proto";
-import "fown.proto";
 
 message tunfile_entry {
 	required uint32		id		= 1;