ARC: Remove SET_PERSONALITY (tracks cross-arch change)

Tracks commit e72837e3 "default SET_PERSONALITY() in linux/elf.h"
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

arch/arc/include/asm/elf.h

@@ -72,7 +72,4 @@ extern int elf_check_arch(const struct elf32_hdr *);
  */
 #define ELF_PLATFORM	(NULL)
 
-#define SET_PERSONALITY(ex) \
-	set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
-
 #endif