EDAC/thunderx: Remove unused struct error_syndrome

struct error_syndrome appears never to have been used. Remove it,
together with the MAX_SYNDROME_REGS it used.

Signed-off-by: Dr. David Alan Gilbert <[e-mail]>
Signed-off-by: Borislav Petkov (AMD) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/edac/thunderx_edac.c

···
 	ERR_UNKNOWN	= 3,
 };
 
-#define MAX_SYNDROME_REGS 4
-
-struct error_syndrome {
-	u64 reg[MAX_SYNDROME_REGS];
-};
-
 struct error_descr {
 	int	type;
 	u64	mask;