remove some e_sys code which prevented umounting user-mounted devices when devices were not mounted as /media/$dev
remove some e_sys code which prevented umounting user-mounted devices when devices were not mounted as /media/$dev


SVN revision: 77252

FlorentRevest/Enlightenment,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,rvandegrift/e,rvandegrift/e,FlorentRevest/Enlightenment,tizenorg/platform.upstream.enlightenment,tasn/enlightenment,rvandegrift/e,tasn/enlightenment,tasn/enlightenment,FlorentRevest/Enlightenment