various: removed unused debug lines

app/render/backend/renderworker.cpp

@@ -133,8 +133,6 @@ NodeValueTable RenderWorker::GenerateBlockTable(const TrackOutput *track, const
 
       QList<TimeRange> valid_ranges = preview_cache_->GetValidRanges(range, preview_job_time_);
       if (!valid_ranges.isEmpty()) {
-        qDebug() << "Worker generated valid waveform for" << range << preview_cache_;
-
         QHash<Node*, Node*>::const_iterator i;
         for (i=copy_map_->constBegin(); i!=copy_map_->constEnd(); i++) {
           if (i.value() == track) {

app/render/playbackcache.cpp

@@ -137,7 +137,6 @@ void PlaybackCache::NoLockInvalidate(const TimeRange &r)
   RemoveRangeFromJobs(r);
   qint64 job_time = QDateTime::currentMSecsSinceEpoch();
   jobs_.append({r, job_time});
-  qDebug() << "Creating job" << r << job_time;
 
   InvalidateEvent(r);
 }