chore(core): remove malformed whitespaces (#4244)

* from https://www.codefactor.io/repository/github/azerothcore/azerothcore-wotlk/issues?category=Style&groupId=838&lang=5&page=75

src/server/scripts/Northrend/zone_dalaran.cpp

@@ -553,7 +553,6 @@ public:
 
         void UpdateAI(uint32 diff) override
         {
-
             if (!sWorld->getBoolConfig(CONFIG_MINIGOB_MANABONK))
                 return;
 
@@ -620,7 +619,6 @@ public:
     {
         npc_dalaran_mageAI(Creature* creature) : ScriptedAI(creature)
         {
-
         }
 
         uint32 CoC_Timer;
@@ -649,9 +647,9 @@ public:
         void EnterCombat(Unit* /*who*/) override
         {
         }
+
         void UpdateAI(uint32 diff) override
         {
-
             if (!UpdateVictim())
                 return;