Remove unnecessary attempt to unmount files when creating sandboxes
Remove unnecessary attempt to unmount files when creating sandboxes

Resolves: LE-4757
Change-Id: I143cd424f75abd9bf7b412ace06c7682edb67f70

legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af