Remove "refreshOffers" prop (!406)

Drakia found a commit adding this, this will bork it till a refresh happens, removing fixes the issue

Reviewed-on: SPT/Server#406
Co-authored-by: CWX <cwxdev@outlook.com>
Co-committed-by: CWX <cwxdev@outlook.com>

project/assets/database/traders/54cb50c76803fa8b248b4571/base.json

@@ -122,6 +122,5 @@
     "category": [],
     "id_list": []
   },
-  "unlockedByDefault": true,
-  "refreshTraderRagfairOffers": false
-}
+  "unlockedByDefault": true
+}