D7999: Drop workaround for QQC1 QGuiApplication crashes

[Antonio Rojas]

arojas created this revision.
arojas added reviewers: davidedmundson, fvogt.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.

REVISION SUMMARY
  Now that QT_QUICK_CONTROLS_1_STYLE is not set in startkde anymore, drop the workaround for QGuiApplication crashes. Qt already takes care of setting the QQC1 style to Desktop for QApplications, so there's no reason why this should need to be set explicitely. If someone still does, we can assume that they know what they're doing and the consequences thereof, including QGuiApplication crashes.
  
  Depends on https://phabricator.kde.org/D7998.

TEST PLAN
  With this and https://phabricator.kde.org/D7998, run kalgebramobile -> doesn't crash

REPOSITORY
  R135 Integration for Qt applications in Plasma

REVISION DETAIL
  https://phabricator.kde.org/D7999

AFFECTED FILES
  src/platformtheme/kdeplatformtheme.cpp

To: arojas, davidedmundson, fvogt
Cc: plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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