It was removed from packet_info when circuit API was removed. Remove
tests that call circuit_id for testing.
Change-Id: I88e54b288d9d8f99b63e0828663b3025c57e0ec8
Reviewed-on: https://code.wireshark.org/review/24400
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot
Reviewed-by: Michael Mann <mmann78@netscape.net>