Core/SmartAI: Drop support for SMART_ACTION_SEND_CASTCREATUREORGO. It is unused in the current newest TDB, it never even worked like it should and the exact same purpose of this function is already fulfilled by SMART_ACTION_CALL_CASTEDCREATUREORGO (the correct way).

src/server/game/AI/SmartScripts/SmartScriptMgr.h

@@ -397,7 +397,7 @@ enum SMART_ACTION
     SMART_ACTION_THREAT_SINGLE_PCT                  = 13,     // Threat%
     SMART_ACTION_THREAT_ALL_PCT                     = 14,     // Threat%
     SMART_ACTION_CALL_AREAEXPLOREDOREVENTHAPPENS    = 15,     // QuestID
-    SMART_ACTION_SEND_CASTCREATUREORGO              = 16,     // QuestID, SpellId
+    SMART_ACTION_UNUSED_16                          = 16,     // UNUSED
     SMART_ACTION_SET_EMOTE_STATE                    = 17,     // emoteID
     SMART_ACTION_SET_UNIT_FLAG                      = 18,     // Flags (may be more than one field OR'd together), Target
     SMART_ACTION_REMOVE_UNIT_FLAG                   = 19,     // Flags (may be more than one field OR'd together), Target
@@ -572,12 +572,6 @@ struct SmartAction
             uint32 threatDEC;
         } threatPCT;
 
-        struct
-        {
-            uint32 quest;
-            uint32 spell;
-        } castCreatureOrGO;
-
         struct
         {
             uint32 flag1;
@@ -623,7 +617,7 @@ struct SmartAction
         {
             uint32 creature;
             uint32 spell;
-        } castedCreatureOrGO;
+        } callCastedCreatureOrGO;
 
         struct
         {