When editing a Markdown file (and potentially other types) a small toolbar appears in the tabbed interface for open files, to switch modes between "Editor", "Editor and preview", and "Preview":

The toolbar disappears when editing other file types.

I'd like to disable this toolbar, as it causes distracting jumping/reflowing of the tabs when using the multi-line tabbed interface. Is this possible without simply disabling the entire Markdown plugin (which works but seems like overkill)?