refactor: remove unused parts

inc/Application.h

@@ -1,7 +1,6 @@
 #pragma once
 #include "Note.h"
 #include "Renderer.h"
-#include "RingBuffer.h"
 #include "Synth.h"
 #include "SynthGuiState.h"
 #include "raylib.h"
@@ -10,10 +9,8 @@ class Application {
   private:
     Synth m_synth;
     SynthGuiState m_synth_gui_state;
-    RingBuffer<float>* m_ring_buffer;
     AudioStream m_synth_stream;
     int m_sound_played_count;
-    float* m_temp_buffer;
     Note* m_current_note;
     Renderer m_renderer;
     bool detect_note_pressed(Note* note);
@@ -21,7 +18,6 @@ class Application {
     void init_audio();
     void update_on_note_input();
     void play_buffered_audio();
-    void fill_audio_buffer();
 
   public:
     Application(/* args */);