Remove some historical cruft inherited from the loopback driver in which there were three possible different code paths through which we could discard a packet (which, after all, is the entire function of this interface).
Remove some historical cruft inherited from the loopback driver in which
there were three possible different code paths through which we could
discard a packet (which, after all, is the entire function of this interface).

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase