You mean AI traffic… AIG does not deal with live traffic, nor change the MSFS live traffic in any way.
When you installed AIG, it should have asked you if you wanted to disable the MSFS built-in AI traffic. Now if you answered ‘yes’ then it would have renamed the file trafficAircraft.bgl to trafficAircraft.bgl.aigoff (in the …\Official\OneStore\fs-base-ai-traffic\scenery\world\traffic folder).
So yeah just deleting the AIG folders won’t bring your AI traffic back, you will have to rename that file back to trafficAircraft.bgl too.