Massive removal of unused modules

src/audio_core/null_sink.h

@@ -1,34 +0,0 @@
-// Copyright 2016 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <cstddef>
-#include "audio_core/audio_core.h"
-#include "audio_core/sink.h"
-
-namespace AudioCore {
-
-class NullSink final : public Sink {
-public:
-    ~NullSink() override = default;
-
-    unsigned int GetNativeSampleRate() const override {
-        return native_sample_rate;
-    }
-
-    void EnqueueSamples(const s16*, size_t) override {}
-
-    size_t SamplesInQueue() const override {
-        return 0;
-    }
-
-    void SetDevice(int device_id) override {}
-
-    std::vector<std::string> GetDeviceList() const override {
-        return {};
-    }
-};
-
-} // namespace AudioCore