Remove unused code for loading task switcher KCM
For all the task switchers on my system there is no KCM installed:
rg 'X-KDE-ParentComponents=(PlasmaXLight|org.kde.breeze.desktop|org.kde.breezedark.desktop|org.kde.breezetwilight.desktop|org.kde.breeze.desktop|org.kde.breezedark.desktop|org.kde.breezetwilight.desktop|org.kde.plasma.mycroft.bigscreen|small_icons|big_icons|compact|text|present_windows|thumbnail_grid|thumbnails|informative)'As the docs state, this is only for buildin effects. Which means it is internal API. Also I consider the choice of displaying a KCM or the preview odd, IMHO the preview is the most important part.
I stumbled upon this when reviewing the metadata files as part of the preparation for https://phabricator.kde.org/T14564.
Also this way of plugin loading is discouraged for performance reasons, because all the plugins from the namespace have to be reopened to get their metadata.