message: Remove plugin search path setting, to preserve compatibility with
  earlier Qt5WebKit
diff: @@ -175,7 +175,6 @@ int main(int argc, char *argv[])
  QWebSettings::globalSettings()->setAttribute(QWebSettings::DeveloperExtrasEnabled, true);
  // Under no circumstances should any browser plugins be loaded.
  - QWebSettings::globalSettings()->setPluginSearchPaths(QStringList());
  QWebSettings::globalSettings()->setAttribute(QWebSettings::PluginsEnabled, false);
  QWebSettings::globalSettings()->setAttribute(QWebSettings::JavaEnabled, false);
  