kexec_elf: remove Elf_Rel macro

It wasn't used anywhere, so lets drop it.
Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>

kernel/kexec_elf.c

@@ -23,10 +23,6 @@
 
 #define elf_addr_to_cpu	elf64_to_cpu
 
-#ifndef Elf_Rel
-#define Elf_Rel		Elf64_Rel
-#endif /* Elf_Rel */
-
 static inline bool elf_is_elf_file(const struct elfhdr *ehdr)
 {
 	return memcmp(ehdr->e_ident, ELFMAG, SELFMAG) == 0;