Remove justIdSystem from modules.json (#80)

Removed 'justIdSystem' from the modules list.

Author: JSzychulec

modules.json

@@ -27,7 +27,6 @@
   "priceFloors",
   "visxBidAdapter",
   "currency",
-  "justIdSystem",
   "dasBidAdapter",
   "paapi",
   "paapiForGpt",