Revert "BUG/MINOR: quix: Memleak for non in flight TX packets"

This reverts commit da9c441886dbfa02840a93e367f65fd6d312c835.

Indeed this commit prevented the ACK only packets to be used as other packets
when they are acknowledged. Even if not ack-eliciting packets they are
acknowledged alongside others packets. Such acknowledged ACK only packets
must be used for instance to compute the RTT.

Must be backported to 2.6 if da9c441 was backported to 2.6.
1 file changed