D20157: Remove critical error

[Kai Uwe Broulik]

broulik created this revision.
broulik added reviewers: Plasma, VDG.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
broulik requested review of this revision.

REVISION SUMMARY
  None of the backends emit it the signal anymore.
  It is unlikely for the `connect()` to `Battery`'s signals to fail.
  No plugin being present is likely just a broken setup, it will still print to console.

REPOSITORY
  R122 Powerdevil

REVISION DETAIL
  https://phabricator.kde.org/D20157

AFFECTED FILES
  daemon/powerdevilcore.cpp
  daemon/powerdevilcore.h
  powerdevil.notifyrc

To: broulik, #plasma, #vdg
Cc: plasma-devel, jraleigh, GB_2, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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