chore(PCH): remove "ScriptPCH.h" from cpp scripts (#1423)

remove "ScriptPCH.h" from cpp scripts as it is intended to be used as precompiled header for the build process only

src/server/scripts/EasternKingdoms/SunwellPlateau/boss_brutallus.cpp

@@ -3,7 +3,6 @@
 */
 
 #include "ScriptMgr.h"
-#include "ScriptPCH.h"
 #include "ScriptedCreature.h"
 #include "sunwell_plateau.h"
 

src/server/scripts/EasternKingdoms/SunwellPlateau/boss_eredar_twins.cpp

@@ -3,7 +3,6 @@
  */
 
 #include "ScriptMgr.h"
-#include "ScriptPCH.h"
 #include "ScriptedCreature.h"
 #include "sunwell_plateau.h"
 #include "SpellInfo.h"

src/server/scripts/EasternKingdoms/SunwellPlateau/sunwell_plateau.h

@@ -5,7 +5,11 @@
 #ifndef SUNWELL_PLATEAU_H
 #define SUNWELL_PLATEAU_H
 
-#include "ScriptPCH.h"
+#include "Player.h"
+#include "SpellScript.h"
+#include "PassiveAI.h"
+#include "SpellAuraEffects.h"
+#include "CreatureAIImpl.h"
 
 enum DataTypes
 {