[lldb/Utility] YAML validation should be orthogonal to packet semantics.

It's not up to YAML to validate the semantics of the GDB remote packet
struct. This is especially wrong here as there's nothing that says that
the amount of bytes transmitted  matches the packet payload size.

lldb/source/Utility/GDBRemote.cpp

@@ -93,9 +93,6 @@ void yaml::MappingTraits<GDBRemotePacket>::mapping(IO &io,
 StringRef
 yaml::MappingTraits<GDBRemotePacket>::validate(IO &io,
                                                GDBRemotePacket &Packet) {
-  if (Packet.bytes_transmitted != Packet.packet.data.size())
-    return "BinaryData size doesn't match bytes transmitted";
-
   return {};
 }