Scripts/ICC: little bit of cleanup in Valithria after the "recent" changes

Port From (https://github.com/TrinityCore/TrinityCore/commit/d7571e5d1f3b4cd5672a6344d96c782d7c83ea88)

Source/Game/AI/CoreAI/CreatureAI.cs

@@ -79,11 +79,10 @@ namespace Game.AI
                 return;
             }
 
-            var playerList = map.GetPlayers();
+            if (!map.HavePlayers())
-            if (playerList.Empty())
                 return;
 
-            foreach (var player in playerList)
+            foreach (var player in map.GetPlayers())
             {
                 if (player != null)
                 {

Source/Game/Combat/CombatManager.cs

@@ -80,6 +80,15 @@ namespace Game.Combat
             }
         }
 
+        public bool HasPvECombatWithPlayers()
+        {
+            foreach (var reference in _pveRefs)
+                if (reference.Value.GetOther(_owner).IsPlayer())
+                    return true;
+
+            return false;
+        }
+        
         public bool HasPvPCombat()
         {
             foreach (var pair in _pvpRefs)