Merge pull request #1487 from lioncash/maybe-unused

yuzu/main: Apply the [[maybe_unused]] attribute to the parameter of SetDiscordEnabled

src/yuzu/main.cpp

@@ -1567,7 +1567,7 @@ void GMainWindow::UpdateUITheme() {
     emit UpdateThemedIcons();
 }
 
-void GMainWindow::SetDiscordEnabled(bool state) {
+void GMainWindow::SetDiscordEnabled([[maybe_unused]] bool state) {
 #ifdef USE_DISCORD_PRESENCE
     if (state) {
         discord_rpc = std::make_unique<DiscordRPC::DiscordImpl>();