The heuristic for T.125 per is too week and we do not have a PER dissector
for T.125 so remove the test.
Remove unused hf entries.
Fixes bug 10350.

Change-Id: If28de7877388c669082f8c8a21dd63107d417fbf
Reviewed-on: https://code.wireshark.org/review/3458
Reviewed-by: Anders Broman <a.broman58@gmail.com>