Solve some unreferenced parameter warnings

(C4100: unreferenced formal parameter)

src/citra_qt/configuration/configure_touch_from_button.cpp

@@ -327,6 +327,7 @@ void ConfigureTouchFromButton::OnBindingChanged(QStandardItem* item) {
 }
 
 void ConfigureTouchFromButton::OnBindingDeleted(const QModelIndex& parent, int first, int last) {
+    Q_UNUSED(parent);
     for (int i = first; i <= last; ++i) {
         auto ix = binding_list_model->index(i, 0);
         if (!ix.isValid()) {
@@ -514,6 +515,7 @@ void TouchScreenPreview::mouseMoveEvent(QMouseEvent* event) {
 }
 
 void TouchScreenPreview::leaveEvent(QEvent* event) {
+    Q_UNUSED(event);
     if (coord_label) {
         coord_label->clear();
     }