sharepoint online – How to Remove the Quick Launch Column in a Publishing Site

Hello felas and ladies,

I need to remove the quick launch column in a document library, while using the Modern View of Sharepoint.

I need to keep activated the Sharepoint Publishing infrastructure, so I need a hack to can remove the quick launch by using powershell or other settings.
I know that performing this task is possible, because I did it in past BUT I do not remember how to do it again!
I would appreciate your answers-