citra-qt: remove dead code

src/citra_qt/bootmanager.cpp

@@ -240,8 +240,6 @@ void GRenderWindow::focusOutEvent(QFocusEvent* event) {
     InputCommon::GetKeyboard()->ReleaseAllKeys();
 }
 
-void GRenderWindow::ReloadSetKeymaps() {}
-
 void GRenderWindow::OnClientAreaResized(unsigned width, unsigned height) {
     NotifyClientAreaSizeChanged(std::make_pair(width, height));
 }

src/citra_qt/bootmanager.h

@@ -130,8 +130,6 @@ public:
 
     void focusOutEvent(QFocusEvent* event) override;
 
-    void ReloadSetKeymaps();
-
     void OnClientAreaResized(unsigned width, unsigned height);
 
     void InitRenderTarget();

src/citra_qt/main.cpp

@@ -612,7 +612,6 @@ void GMainWindow::OnConfigure() {
     auto result = configureDialog.exec();
     if (result == QDialog::Accepted) {
         configureDialog.applyConfiguration();
-        render_window->ReloadSetKeymaps();
         config->Save();
     }
 }