MappingButton: remove GetFirstButtonPress logic

Source/Core/DolphinQt2/Config/Mapping/MappingButton.cpp

@@ -42,13 +42,8 @@ void MappingButton::OnButtonPressed()
 
     setText(QStringLiteral("..."));
 
-    Common::SleepCurrentThread(100);
-
     SetBlockInputs(true);
 
-    if (m_parent->GetFirstButtonPress())
-      m_reference->Detect(10, dev.get());
-
     // Avoid that the button press itself is registered as an event
     Common::SleepCurrentThread(100);
 

Source/Core/DolphinQt2/Config/Mapping/MappingWidget.cpp

@@ -114,16 +114,6 @@ void MappingWidget::Update()
   LoadSettings();
 }
 
-bool MappingWidget::GetFirstButtonPress()
-{
-  if (m_first)
-  {
-    m_first = false;
-    return true;
-  }
-  return false;
-}
-
 ControllerEmu::EmulatedController* MappingWidget::GetController() const
 {
   return m_parent->GetController();

Source/Core/DolphinQt2/Config/Mapping/MappingWidget.h

@@ -51,7 +51,6 @@ public:
   virtual InputConfig* GetConfig() = 0;
 
   void Update();
-  bool GetFirstButtonPress();
 
 protected:
   int GetPort() const;