A quick search of CCC and CFA revealed no use of the term "Deactivated War Trophy", same with the CFC website. There is a fact sheet on "Deactivation Guidelines", but it says nothing about the legal status of such devices.
I recall seeing a court case where a deactivated/disabled pistol was ruled to be a Replica Firearm. I'll see if I can dig it up.
"The Bird of Hermes is My Name, Eating My Wings to Make Me Tame."