chore: remove unused XScreenInputFailure

src/lib/deskflow/XScreen.cpp

@@ -16,15 +16,6 @@ std::string XScreenOpenFailure::getWhat() const throw()
   return format("XScreenOpenFailure", "unable to open screen");
 }
 
-//
-// XScreenXInputFailure
-//
-
-std::string XScreenXInputFailure::getWhat() const throw()
-{
-  return "";
-}
-
 //
 // XScreenUnavailable
 //

src/lib/deskflow/XScreen.h

@@ -28,17 +28,6 @@ protected:
   std::string getWhat() const throw() override;
 };
 
-/**
- * @brief XScreenXInputFailure - Thrown when an XInput error occurs
- */
-class XScreenXInputFailure : public XScreen
-{
-  using XScreen::XScreen;
-
-protected:
-  std::string getWhat() const throw() override;
-};
-
 //! Screen unavailable exception
 /*!
 Thrown when a screen cannot be opened or initialized but retrying later