[desktop] only warn on firmware for qlaunch/games (#363)

- only warns about too new/missing for home menu
- only warns about missing for games that need it (mk8dx)

Signed-off-by: crueter <crueter@eden-emu.dev>

Reviewed-on: #363
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: MaranBr <maranbr@outlook.com>

src/yuzu/main.h

@@ -424,7 +424,6 @@ private slots:
     void OnCreateHomeMenuShortcut(GameListShortcutTarget target);
     void OnCaptureScreenshot();
     void OnCheckFirmwareDecryption();
-    void OnCheckFirmware();
     void OnLanguageChanged(const QString& locale);
     void OnMouseActivity();
     bool OnShutdownBegin();