Remove a no longer needed variable and commented out an unused parameter.

src/formula_ai.cpp

@@ -395,7 +395,7 @@ public:
 	}
 
 private:
-	variant execute(const formula_callable& variables) const {
+	variant execute(const formula_callable& /*variables*/) const {
 
 		int villages_number = ai_.get_info().map.villages().size();
 
@@ -420,8 +420,6 @@ private:
 			}
 		}
 
-		int controlled_villages = allied_villages_number + opponents_villages_number;
-
 		//how important is each village, but multipled by 50
 		int single_village_ratio = 0;