[Extractor] Remove IdleStateMonitor wrapper class
Summary:
IdleStateMonitor is just a wrapper around KIdleTime, which can be
implemented in a few lines inline.
Reviewers: Baloo, ngraham
Reviewed By: Baloo, ngraham
Subscribers: broulik, kde-frameworks-devel
Tags: Frameworks, Baloo
Differential Revision: https://phabricator.kde.org/D28862