remove sha256 endianness check, it actually works fine on big endian

i am an idiot i'm sorry

src/util/meson.build

@@ -44,11 +44,7 @@ if use_libcrypto
     util_src += files('sha256_openssl.c')
     util_deps += [dep_crypto]
 else
-    assert(host_machine.endian() == 'little',
-        'The built-in SHA-256 implementation only supports little-endian CPUs. Enable use_libcrypto to use the OpenSSL version, or send a patch with a better implementation :)'
-    )
-
-    util_src += files('sha256_le.c')
+    util_src += files('sha256.c')
 endif
 
 if host_machine.system() == 'windows'

src/util/sha256.c

@@ -12,11 +12,6 @@
 #include "util/stringops.h"
 
 #include <string.h>
-#include <SDL.h>
-
-#if SDL_BYTEORDER != SDL_LIL_ENDIAN
-	#error "This SHA-256 is little-endian only"
-#endif
 
 typedef uint32_t sha256_word_t;
 typedef uint8_t sha256_byte_t;