D28062: Fix compiler warnings

apol created this revision.
apol added a reviewer: KWin.
Herald added a project: KWin.
Herald added a subscriber: kwin.
apol requested review of this revision.

REVISION SUMMARY
  No need to keep them around for no reason.

TEST PLAN
  Tested the plugins I thought could be affected. Have been using it for a couple of days without problems

REPOSITORY
  R108 KWin

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D28062

AFFECTED FILES
  CMakeLists.txt
  abstract_wayland_output.cpp
  debug_console.cpp
  decorations/settings.cpp
  effects/highlightwindow/highlightwindow.cpp
  effects/screenshot/screenshot.cpp
  effects/showfps/showfps.cpp
  effects/showfps/showfps.h
  input.cpp
  kcmkwin/kwindecoration/declarative-plugin/previewclient.cpp
  kcmkwin/kwintabbox/main.cpp
  layers.cpp
  libkwineffects/kwinglplatform.cpp
  main_wayland.cpp
  plugins/kdecorations/aurorae/src/aurorae.cpp
  plugins/platforms/drm/drm_backend.cpp
  plugins/platforms/drm/edid.cpp
  plugins/platforms/fbdev/scene_qpainter_fb_backend.cpp
  plugins/platforms/virtual/egl_gbm_backend.cpp
  plugins/platforms/wayland/wayland_backend.cpp
  plugins/platforms/x11/standalone/glxbackend.cpp
  plugins/scenes/opengl/scene_opengl.cpp
  tabbox/clientmodel.cpp
  useractions.cpp
  wayland_server.cpp
  xwl/drag_x.cpp

To: apol, #kwin
Cc: kwin, Orage, cacarry, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, GB_2, mkulinski, ragreen, jackyalcine, iodelay, crozbo, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, romangg, jensreuterberg, abetts, sebas, apol, ahiemstra, mart