Fix classification "by-port" (#1851)

Classification "by-port" should be the last possible effort, *after*
having test all the LRU caches.

Remove some dead code from `ndpi_detection_giveup()`:
`flow->guessed_protocol_id` is never set to any od those voip protocols
and at that point in this function we never have both a master *and* a
application protocols.
Coverage reports (both from unit tests and from fuzzing) confirms that
was dead code.

0 files changed, 0 insertions, 0 deletions