Removed unused size checking on GetPhysicalDevices

The method is only being called once so this doesn't make sense. It was some left over of me trying to get this done some other way.

src/qt_gui/main_window.cpp

@@ -161,7 +161,6 @@ void MainWindow::LoadGameLists() {
 }
 
 void MainWindow::GetPhysicalDevices() {
-    if (m_physical_devices.size() == 0) {
         Vulkan::Instance instance(false, false);
         auto physical_devices = instance.GetPhysicalDevices();
         for (const vk::PhysicalDevice physical_device : physical_devices) {
@@ -173,7 +172,6 @@ void MainWindow::GetPhysicalDevices() {
             m_physical_devices.push_back(name);
         }
     }
-}
 
 void MainWindow::CreateConnects() {
     connect(this, &MainWindow::WindowResized, this, &MainWindow::HandleResize);