D24759: [ksmserver] Drop unused logout effect widget

[David Edmundson]

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

REVISION SUMMARY
  At some point there was an effect in kwin to fade to a grey (with a
  weird vigenette effect) as one logs out.
  
  This was signalled with a fake offscreen window with a special window
  ID.
  
  The kwin effect has gone, deleted in Plasma 5.8 with
  af80a546bfe258b54468b159bb8cf78f16ca9ebf <https://phabricator.kde.org/R108:af80a546bfe258b54468b159bb8cf78f16ca9ebf>
  
  (Kwin still contains an effect called logout, but that's merely for the
  logout prompt)
  
  I intend to replace this logout effect but as I'm going to start from
  scratch we may as well communicate from ksmserver -> kwin with a new API
  that works on wayland and and solves some other issues all in one.

TEST PLAN
  Compiles

REPOSITORY
  R120 Plasma Workspace

BRANCH
  ksmserver_kwin_state

REVISION DETAIL
  https://phabricator.kde.org/D24759

AFFECTED FILES
  ksmserver/logout.cpp
  ksmserver/server.cpp
  ksmserver/server.h

To: davidedmundson, #plasma, #kwin
Cc: plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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