How can I disable the underlines in PEP 8 weak warnings?

Since PEP 8 Weak warnings are displayed in the top right corner, I would prefer not to have unnecessary annoying underlines in the editor.

So, initially, I tried changing 'Highlighting in the editor,' but it didn't work. Then, I switched 'Severity' to 'No highlighting (fix available),' but that also didn't work. Even when I added a new item to 'Severity,' it didn't make any difference.

The only changes I could make were to disable the checks for PEP 8 items and customize the appearance of 'Underwaved' through 'Edit' in ‘Highlighting in the editor.’

It seemed like I should be able to remove the underline through 'Highlighting in the editor,' but why is it not possible? Am I misunderstanding something?