winrt: Removed WinRT/Windows Phone/UWP support.

Fixes #10724.

build-scripts/rename_macros.py

@@ -129,7 +129,6 @@ RENAMED_MACROS = {
     "__VITA__": "SDL_PLATFORM_VITA",
     "__3DS__": "SDL_PLATFORM_3DS",
     # "__unix__": "SDL_PLATFORM_UNIX,
-    "__WINRT__": "SDL_PLATFORM_WINRT",
     "__XBOXSERIES__": "SDL_PLATFORM_XBOXSERIES",
     "__XBOXONE__": "SDL_PLATFORM_XBOXONE",
     "__WINDOWS__": "SDL_PLATFORM_WINDOWS",
@@ -145,6 +144,7 @@ DEPRECATED_PLATFORM_MACROS = {
     "__NACL__",
     "__PNACL__",
     "__WINDOWS__",
+    "__WINRT__",
     "SDL_ALTIVEC_BLITTERS",
     "SDL_ARM_NEON_BLITTERS",
     "SDL_ARM_SIMD_BLITTERS",