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/ShadowfangKeep/instance_shadowfang_keep.cpp

@@ -3,7 +3,6 @@
 */
 
 #include "ScriptMgr.h"
-#include "ScriptPCH.h"
 #include "InstanceScript.h"
 #include "shadowfang_keep.h"
 #include "TemporarySummon.h"

src/server/scripts/EasternKingdoms/ShadowfangKeep/shadowfang_keep.h

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