WelcomeMode: Remove screenDependHeightDistance()

That function always returns 16.

Change-Id: I65cb0c62c5e553791f25e964de9eaf23a0f65687
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/coreplugin/iwelcomepage.cpp

@@ -49,11 +49,6 @@ IWelcomePage::~IWelcomePage()
 {
 }
 
-int IWelcomePage::screenDependHeightDistance()
-{
-    return std::min(50, std::max(16, ICore::mainWindow()->height() / 30));
-}
-
 static QPalette buttonPalette(bool isActive, bool isCursorInside, bool forText)
 {
     QPalette pal;