src: Remove unneeded 'include <delay.h>'

Change-Id: Ibf91c35aa389a91116463616a778212bb386756e
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34230
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/common/rtc.c

@@ -13,7 +13,6 @@
  * GNU General Public License for more details.
  */
 
-#include <delay.h>
 #include <soc/rtc_common.h>
 #include <soc/rtc.h>
 #include <soc/pmic_wrap.h>