I’ve updated a project from 5.x to 6 for the first time and it looks like I am able to remove some files that are no longer needed.
Specifically project.pro > project.kicad_pro, .sch > .kicad.sch.
Is it safe to delete these if I have no intention of using this project with KiCad 5 anymore, and are there any others I can delete to keep tidy.