Remove dead campaign.

https://github.com/dcs-liberation/dcs_liberation/issues/1359
(cherry picked from commit b930e13964ffda9f288a9733aec108f4d04f227e)

resources/campaigns/inherent_resolve.json

@@ -1,11 +0,0 @@
-{
-  "name": "Syria - Inherent Resolve",
-  "theater": "Syria",
-  "authors": "Khopa",
-  "recommended_player_faction": "USA 2005",
-  "recommended_enemy_faction": "Insurgents (Hard)",
-  "description": "<p>In this scenario, you start from Jordan, and have to fight your way through eastern Syria.</p>",
-  "version": "6.1",
-  "miz": "inherent_resolve.miz",
-  "performance": 2
-}