nb/intel/ironlake/raminit.c: Drop unused define

This is the only instance of `BETTER_MEMORY_MAP` in the tree.

Change-Id: I118e5b5a0f10da56e2335828477caed81c5bf855
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43729
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/northbridge/intel/ironlake/raminit.c

@@ -1362,8 +1362,6 @@ static unsigned int get_mmio_size(void)
 		return cfg->pci_mmio_size;
 }
 
-#define BETTER_MEMORY_MAP 0
-
 static void program_total_memory_map(struct raminfo *info)
 {
 	unsigned int TOM, TOLUD, TOUUD;