Qt: Purge unused {start,stop}dumpingAudio

src/duckstation-qt/qthost.cpp

@@ -1475,28 +1475,6 @@ void EmuThread::setAudioOutputMuted(bool muted)
   System::UpdateVolume();
 }
 
-void EmuThread::startDumpingAudio()
-{
-  if (!isCurrentThread())
-  {
-    QMetaObject::invokeMethod(this, "startDumpingAudio", Qt::QueuedConnection);
-    return;
-  }
-
-  // System::StartDumpingAudio();
-}
-
-void EmuThread::stopDumpingAudio()
-{
-  if (!isCurrentThread())
-  {
-    QMetaObject::invokeMethod(this, "stopDumpingAudio", Qt::QueuedConnection);
-    return;
-  }
-
-  // System::StopDumpingAudio();
-}
-
 void EmuThread::singleStepCPU()
 {
   if (!isCurrentThread())

src/duckstation-qt/qthost.h

@@ -194,8 +194,6 @@ public Q_SLOTS:
   void undoLoadState();
   void setAudioOutputVolume(int volume, int fast_forward_volume);
   void setAudioOutputMuted(bool muted);
-  void startDumpingAudio();
-  void stopDumpingAudio();
   void singleStepCPU();
   void dumpRAM(const QString& filename);
   void dumpVRAM(const QString& filename);