removed WinRT-specific hints.

include/SDL_hints.h

@@ -2103,105 +2103,6 @@ extern "C" {
 */
 #define SDL_HINT_WINDOW_NO_ACTIVATION_WHEN_SHOWN    "SDL_WINDOW_NO_ACTIVATION_WHEN_SHOWN"
 
-/** \brief Allows back-button-press events on Windows Phone to be marked as handled
- *
- *  Windows Phone devices typically feature a Back button.  When pressed,
- *  the OS will emit back-button-press events, which apps are expected to
- *  handle in an appropriate manner.  If apps do not explicitly mark these
- *  events as 'Handled', then the OS will invoke its default behavior for
- *  unhandled back-button-press events, which on Windows Phone 8 and 8.1 is to
- *  terminate the app (and attempt to switch to the previous app, or to the
- *  device's home screen).
- *
- *  Setting the SDL_HINT_WINRT_HANDLE_BACK_BUTTON hint to "1" will cause SDL
- *  to mark back-button-press events as Handled, if and when one is sent to
- *  the app.
- *
- *  Internally, Windows Phone sends back button events as parameters to
- *  special back-button-press callback functions.  Apps that need to respond
- *  to back-button-press events are expected to register one or more
- *  callback functions for such, shortly after being launched (during the
- *  app's initialization phase).  After the back button is pressed, the OS
- *  will invoke these callbacks.  If the app's callback(s) do not explicitly
- *  mark the event as handled by the time they return, or if the app never
- *  registers one of these callback, the OS will consider the event
- *  un-handled, and it will apply its default back button behavior (terminate
- *  the app).
- *
- *  SDL registers its own back-button-press callback with the Windows Phone
- *  OS.  This callback will emit a pair of SDL key-press events (SDL_KEYDOWN
- *  and SDL_KEYUP), each with a scancode of SDL_SCANCODE_AC_BACK, after which
- *  it will check the contents of the hint, SDL_HINT_WINRT_HANDLE_BACK_BUTTON.
- *  If the hint's value is set to "1", the back button event's Handled
- *  property will get set to 'true'.  If the hint's value is set to something
- *  else, or if it is unset, SDL will leave the event's Handled property
- *  alone.  (By default, the OS sets this property to 'false', to note.)
- *
- *  SDL apps can either set SDL_HINT_WINRT_HANDLE_BACK_BUTTON well before a
- *  back button is pressed, or can set it in direct-response to a back button
- *  being pressed.
- *
- *  In order to get notified when a back button is pressed, SDL apps should
- *  register a callback function with SDL_AddEventWatch(), and have it listen
- *  for SDL_KEYDOWN events that have a scancode of SDL_SCANCODE_AC_BACK.
- *  (Alternatively, SDL_KEYUP events can be listened-for.  Listening for
- *  either event type is suitable.)  Any value of SDL_HINT_WINRT_HANDLE_BACK_BUTTON
- *  set by such a callback, will be applied to the OS' current
- *  back-button-press event.
- *
- *  More details on back button behavior in Windows Phone apps can be found
- *  at the following page, on Microsoft's developer site:
- *  http://msdn.microsoft.com/en-us/library/windowsphone/develop/jj247550(v=vs.105).aspx
- */
-#define SDL_HINT_WINRT_HANDLE_BACK_BUTTON "SDL_WINRT_HANDLE_BACK_BUTTON"
-
-/** \brief Label text for a WinRT app's privacy policy link
- *
- *  Network-enabled WinRT apps must include a privacy policy.  On Windows 8, 8.1, and RT,
- *  Microsoft mandates that this policy be available via the Windows Settings charm.
- *  SDL provides code to add a link there, with its label text being set via the
- *  optional hint, SDL_HINT_WINRT_PRIVACY_POLICY_LABEL.
- *
- *  Please note that a privacy policy's contents are not set via this hint.  A separate
- *  hint, SDL_HINT_WINRT_PRIVACY_POLICY_URL, is used to link to the actual text of the
- *  policy.
- *
- *  The contents of this hint should be encoded as a UTF8 string.
- *
- *  The default value is "Privacy Policy".  This hint should only be set during app
- *  initialization, preferably before any calls to SDL_Init().
- *
- *  For additional information on linking to a privacy policy, see the documentation for
- *  SDL_HINT_WINRT_PRIVACY_POLICY_URL.
- */
-#define SDL_HINT_WINRT_PRIVACY_POLICY_LABEL "SDL_WINRT_PRIVACY_POLICY_LABEL"
-
-/**
- *  \brief A URL to a WinRT app's privacy policy
- *
- *  All network-enabled WinRT apps must make a privacy policy available to its
- *  users.  On Windows 8, 8.1, and RT, Microsoft mandates that this policy be
- *  be available in the Windows Settings charm, as accessed from within the app.
- *  SDL provides code to add a URL-based link there, which can point to the app's
- *  privacy policy.
- *
- *  To setup a URL to an app's privacy policy, set SDL_HINT_WINRT_PRIVACY_POLICY_URL
- *  before calling any SDL_Init() functions.  The contents of the hint should
- *  be a valid URL.  For example, "http://www.example.com".
- *
- *  The default value is "", which will prevent SDL from adding a privacy policy
- *  link to the Settings charm.  This hint should only be set during app init.
- *
- *  The label text of an app's "Privacy Policy" link may be customized via another
- *  hint, SDL_HINT_WINRT_PRIVACY_POLICY_LABEL.
- *
- *  Please note that on Windows Phone, Microsoft does not provide standard UI
- *  for displaying a privacy policy link, and as such, SDL_HINT_WINRT_PRIVACY_POLICY_URL
- *  will not get used on that platform.  Network-enabled phone apps should display
- *  their privacy policy through some other, in-app means.
- */
-#define SDL_HINT_WINRT_PRIVACY_POLICY_URL "SDL_WINRT_PRIVACY_POLICY_URL"
-
 /**
  *  \brief Mark X11 windows as override-redirect.
  *