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/Kalimdor/CavernsOfTime/BattleForMountHyjal/hyjal.h

@@ -7,7 +7,7 @@
 #ifndef DEF_HYJAL_H
 #define DEF_HYJAL_H
 
-#include "ScriptPCH.h"
+#include "GridNotifiers.h"
 
 #define ERROR_INST_DATA     "TSCR: Instance data not set properly for Mount Hyjal. Encounters will be buggy."
 

src/server/scripts/Kalimdor/CavernsOfTime/CullingOfStratholme/culling_of_stratholme.h

@@ -5,8 +5,6 @@
 #ifndef DEF_CULLING_OF_STRATHOLME_H
 #define DEF_CULLING_OF_STRATHOLME_H
 
-#include "ScriptPCH.h"
-
 enum Data
 {
     DATA_ARTHAS_EVENT,

src/server/scripts/Kalimdor/CavernsOfTime/EscapeFromDurnholdeKeep/old_hillsbrad.h

@@ -5,8 +5,6 @@
 #ifndef DEF_OLD_HILLSBRAD_H
 #define DEF_OLD_HILLSBRAD_H
 
-#include "ScriptPCH.h"
-
 enum DataIds
 {
     DATA_ESCORT_PROGRESS    = 0,

src/server/scripts/Kalimdor/CavernsOfTime/TheBlackMorass/the_black_morass.h

@@ -5,7 +5,8 @@
 #ifndef DEF_THEBLACKMORASS_H
 #define DEF_THEBLACKMORASS_H
 
-#include "ScriptPCH.h"
+#include "SpellScript.h"
+#include "PassiveAI.h"
 
 enum DataTypes
 {