No, I mean no bar from wm or whatever manages the workspaces. The applications I run should have windows with title-bars, or more precise attachments with knobs to control the windows. What I can do without are the permanent tool- and task-bars. Bars of the wm/desktop which can't be configured to autohide will be disabled by me. If there are remaining wm-/desktop-bars with clutter up the screen-estate I switch to a sane environment.