Fixed all unused-parameters warnings

issue #121

used clang-tidy to achieve this

src/scripts/Pet/pet_dk.cpp

@@ -220,7 +220,7 @@ class npc_pet_dk_ghoul : public CreatureScript
         {
             npc_pet_dk_ghoulAI(Creature *c) : CombatAI(c) { }
 
-            void JustDied(Unit *who)
+            void JustDied(Unit * /*who*/)
             {
                 if (me->IsGuardian() || me->IsSummon())
                     me->ToTempSummon()->UnSummon();

src/scripts/Pet/pet_generic.cpp

@@ -506,7 +506,7 @@ public:
                 DoStartNoMovement(who);
         }
 
-        void UpdateAI(uint32 diff)
+        void UpdateAI(uint32  /*diff*/)
         {
             if (!me->GetVictim())
                 return;