chore(Core/RBAC): Drop redundant AllowTwoSide configs (#25741)

Co-authored-by: blinkysc <blinkysc@users.noreply.github.com>

src/server/game/Handlers/TradeHandler.cpp

@@ -723,7 +723,6 @@ void WorldSession::HandleInitiateTradeOpcode(WorldPacket& recvPacket)
     }
 
     if (pOther->GetTeamId() != _player->GetTeamId() &&
-        !sWorld->getBoolConfig(CONFIG_ALLOW_TWO_SIDE_TRADE) &&
         !GetPlayer()->GetSession()->HasPermission(rbac::RBAC_PERM_ALLOW_TWO_SIDE_TRADE))
     {
         info.Status = TRADE_STATUS_WRONG_FACTION;