sdl2-compat: revert SDL_GLattr size test from commit fe83d9bed,

From 9d32b8e93ce72c2f5f8ee0ef42c75b3291b64c89 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Thu, 24 Oct 2024 03:35:10 +0300
Subject: [PATCH] revert SDL_GLattr size test from commit fe83d9bed,

SDL_GLAttr is still an enum in SDL3 -- my mistake.
---
 src/sdl2_compat.h | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/src/sdl2_compat.h b/src/sdl2_compat.h
index f91a1d1..3263432 100644
--- a/src/sdl2_compat.h
+++ b/src/sdl2_compat.h
@@ -26,14 +26,6 @@
 
 /* #define SDL_INIT_TIMER 0x00000001u */ /* removed in SDL3. not used here. */
 
-/* Make sure that the SDL2 SDL_GLattr (an enum) and the SDL3 one (an Uint32) are compatible. */
-typedef enum
-{
-   DUMMY_ENUM_VALUE0,
-   DUMMY_ENUM_VALUE1
-} SDL2_DUMMY_ENUM;
-SDL_COMPILE_TIME_ASSERT(SDL23GLattr, sizeof(SDL2_DUMMY_ENUM) == sizeof(SDL_GLAttr));
-
 #ifdef __CC_ARM
 /* ARM's compiler throws warnings if we use an enum: like "SDL2_bool x = a < b;" */
 #define SDL2_FALSE 0