Merge pull request #7227 from Vincent-Michael/PCH

Core/Misc: Use proper headers to optimize compile

src/server/scripts/Spells/spell_holiday.cpp

@@ -20,7 +20,11 @@
  * Scriptnames in this file should be prefixed with "spell_#holidayname_".
  */
 
-#include "ScriptPCH.h"
+#include "ScriptMgr.h"
+#include "ScriptedCreature.h"
+#include "SpellScript.h"
+#include "SpellAuraEffects.h"
+#include "GridNotifiers.h"
 
 // 45102 Romantic Picnic
 enum SpellsPicnic