Core/SAI: Revert SMART_ACTION_SET_STAND_STATE from 013fe44b92, can be done with SMART_ACTION_SET_UNIT_FIELD_BYTES_1.

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

@@ -473,9 +473,8 @@ enum SMART_ACTION
     SMART_ACTION_SEND_GOSSIP_MENU                   = 98,     // menuId, optionId
     SMART_ACTION_GO_SET_LOOT_STATE                  = 99,     // state
     SMART_ACTION_SEND_TARGET_TO_TARGET              = 100,    // id
-    SMART_ACTION_SET_STAND_STATE                    = 101,    // standState
 
-    SMART_ACTION_END                                = 102,
+    SMART_ACTION_END                                = 101,
 };
 
 struct SmartAction
@@ -894,11 +893,6 @@ struct SmartAction
             uint32 id;
         } sendTargetToTarget;
 
-        struct
-        {
-            uint32 standState;
-        } setStandState;
-
         struct
         {
             float distance;