Remove bogus mount points check when starting baloo on save

Summary:
The check stops baloo if non of the included pathes is *currently*
mounted, i.e. if a device is mounted later baloo is not running and
can not pick up the device.

Depends on D27612

Reviewers: #baloo, ngraham

Reviewed By: #baloo, ngraham

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D27613