remove _endian.h, not used anymore

src/borg/_endian.h

@@ -1,30 +0,0 @@
-#if !defined(_MSC_VER)
-#   include <unistd.h>
-#endif
-#include <stdlib.h>
-#include <stdint.h>
-
-#if defined (__SVR4) && defined (__sun)
-#include <sys/isa_defs.h>
-#endif
-
-#if (defined(BYTE_ORDER) && defined(BIG_ENDIAN) && (BYTE_ORDER == BIG_ENDIAN)) ||  \
-    (defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)) || \
-    (defined(_BIG_ENDIAN) && defined(__SVR4) && defined(__sun))
-#define BORG_BIG_ENDIAN 1
-#elif (defined(BYTE_ORDER) && defined(LITTLE_ENDIAN) && (BYTE_ORDER == LITTLE_ENDIAN)) || \
-      (defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)) || \
-      (defined(_LITTLE_ENDIAN) && defined(__SVR4) && defined(__sun)) || \
-      (defined(_MSC_VER) && (defined(_M_AMD64) || defined(_M_IX86)))
-#define BORG_BIG_ENDIAN 0
-#else
-#error Unknown byte order
-#endif
-
-#if BORG_BIG_ENDIAN
-#define _le32toh(x) __builtin_bswap32(x)
-#define _htole32(x) __builtin_bswap32(x)
-#else
-#define _le32toh(x) (x)
-#define _htole32(x) (x)
-#endif