configure_hotkeys: Remove unnecessary Settings::Apply() call

Nothing from the hotkeys dialog relies on this call occurring, and is
already called from the dialog that calls applyConfiguration().

src/yuzu/configuration/configure_hotkeys.cpp

@@ -111,7 +111,6 @@ void ConfigureHotkeys::applyConfiguration(HotkeyRegistry& registry) {
     }
 
     registry.SaveHotkeys();
-    Settings::Apply();
 }
 
 void ConfigureHotkeys::retranslateUi() {