Make Deezer engine use quality setting

src/deezer/deezerservice.cpp

@@ -117,7 +117,6 @@ void DeezerService::ReloadSettings() {
 
   QSettings s;
   s.beginGroup(DeezerSettingsPage::kSettingsGroup);
-  quality_ = s.value("quality", "FLAC").toString();
   searchdelay_ = s.value("searchdelay", 1500).toInt();
   albumssearchlimit_ = s.value("albumssearchlimit", 100).toInt();
   songssearchlimit_ = s.value("songssearchlimit", 100).toInt();

src/deezer/deezerservice.h

@@ -133,7 +133,6 @@ class DeezerService : public InternetService {
 #endif
   QTimer *timer_searchdelay_;
 
-  QString quality_;
   int searchdelay_;
   int albumssearchlimit_;
   int songssearchlimit_;