Move get_unaligned_le32() macros to platform.h

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

networking/tls_aes.c

@@ -40,10 +40,6 @@
  */
 #include "tls.h"
 
-/* TODO: grep for this and move to libbb */
-#define get_unaligned_be32(buf) ({ uint32_t v; move_from_unaligned32(v, buf); SWAP_BE32(v); })
-
-
 // The lookup-tables are marked const so they can be placed in read-only storage instead of RAM
 // The numbers below can be computed dynamically trading ROM for RAM -
 // This can be useful in (embedded) bootloader applications, where ROM is often limited.