src: Drop unused '#include <halt.h>'

Change-Id: Ie7afe77053a21bcf6a1bf314570f897d1791a620
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31921
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/commonlib/storage/bouncebuf.c

@@ -17,7 +17,6 @@
 
 #include <arch/cache.h>
 #include "bouncebuf.h"
-#include <halt.h>
 #include "storage.h"
 #include <string.h>
 #include <commonlib/stdlib.h>

src/commonlib/storage/sdhci.c

@@ -24,7 +24,6 @@
 #include <commonlib/storage.h>
 #include <delay.h>
 #include <endian.h>
-#include <halt.h>
 #include "sdhci.h"
 #include "sd_mmc.h"
 #include "storage.h"