Remove ignored files

maps/skirmishes/Circle Of Bosses.xml

@@ -52,7 +52,7 @@
     {},
     {}
   ],
-  "Preview": "",
+  "Preview": "landscape.jpg",
   "RevealMap": false,
   "VictoryConditions": [
     "conquest"
@@ -26128,4 +26128,4 @@
 		</Entity>
 	</Entities>
 	<Paths/>
-</Scenario>
+</Scenario>