Cleanup up unnecessary audio init functions

Windows/MainWindowMenu.cpp

@@ -917,10 +917,6 @@ namespace MainWindow {
 
 		case ID_EMULATION_SOUND:
 			g_Config.bEnableSound = !g_Config.bEnableSound;
-			if (g_Config.bEnableSound) {
-				if (PSP_IsInited() && !IsAudioInitialised())
-					Audio_Init();
-			}
 			break;
 
 		case ID_HELP_OPENWEBSITE:

Windows/WindowsHost.cpp

@@ -175,9 +175,6 @@ void WindowsHost::SetWindowTitle(const char *message) {
 	PostMessage(mainWindow_, MainWindow::WM_USER_WINDOW_TITLE_CHANGED, 0, 0);
 }
 
-void WindowsHost::InitSound() {
-}
-
 // UGLY!
 extern WindowsAudioBackend *winAudioBackend;
 
@@ -186,9 +183,6 @@ void WindowsHost::UpdateSound() {
 		winAudioBackend->Update();
 }
 
-void WindowsHost::ShutdownSound() {
-}
-
 void WindowsHost::PollControllers() {
 	static int checkCounter = 0;
 	static const int CHECK_FREQUENCY = 71;

Windows/WindowsHost.h

@@ -39,9 +39,7 @@ public:
 	void PollControllers() override;
 	void ShutdownGraphics() override;
 
-	void InitSound() override;
 	void UpdateSound() override;
-	void ShutdownSound() override;
 
 	bool AttemptLoadSymbolMap() override;
 	void SaveSymbolMap() override;