When checking through the yaml files. I haven't encountered an option to disable certain traits with a mod.
I know you can delete traits from your GamingAssets folder, but that is not a proper solution if you want to do it with a mod.
Ideally we would copy the file of the trait we want to disable into our own worldgen/traits folder and add a setting to the file
Thanks for your consideration
Steps to Reproduce
Non so far, it's a suggestion
This issue has not been confirmed by a developer yet.