Updated Calculator diagnostic data collection per the specification (#572)

- Removed unneeded diagnostic events and code
- Added and consolidated events into the events defined in the spec

src/Calculator/AboutFlyout.xaml.cpp

@@ -61,8 +61,3 @@ void AboutFlyout::SetDefaultFocus()
 {
     AboutFlyoutEULA->Focus(::FocusState::Programmatic);
 }
-
-void CalculatorApp::AboutFlyout::UserControl_Loaded(Platform::Object ^ sender, Windows::UI::Xaml::RoutedEventArgs ^ e)
-{
-    TraceLogger::GetInstance().LogAboutFlyoutOpened();
-}