We had weapon config, but this was for prediction (speed and drop.)
COD is not CS2 to worry about individual config for each weapon. Everything is straightforward with COD and doesn't need any weapon cfg.
It's a completely useless feature. If you feel otherwise, you're probably among the 0.1% who think this way.

Also, remember that each weapon has an attachment that does something else.
If you combine MW2, MW3, and BO6 weapons, you get well over 1000 attachments.
Config-wise, it will get messy, and I know it because back in Verdansk, when we had the weapon config, it was a pain in the butt when CW integration dropped and then Vanguard.
Therefore, it's no longer needed, as our cheat automatically obtains this information and adjusts for prediction.