vf_scale: don't byte-swap palette on big endian architectures

ffmpeg's and the internal palette format used to have different
endianess, but that is not the case anymore. This code was forgotten
when that change was made.

video/filter/vf_scale.c

@@ -341,14 +341,6 @@ static void scale(struct SwsContext *sws1, struct SwsContext *sws2,
                   int interlaced)
 {
     const uint8_t *src2[MP_MAX_PLANES] = {src[0], src[1], src[2], src[3]};
-#if BYTE_ORDER == BIG_ENDIAN
-    uint32_t pal2[256];
-    if (src[1] && !src[2]) {
-        for (int i = 0; i < 256; i++)
-            pal2[i] = bswap_32(((uint32_t *)src[1])[i]);
-        src2[1] = pal2;
-    }
-#endif
 
     if (interlaced) {
         int i;