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

Change-Id: I6afea5c102299e570378a1656d3dcd329a373399
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44093
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/mt8173/i2c.c

@@ -2,7 +2,6 @@
 
 #include <assert.h>
 #include <console/console.h>
-#include <delay.h>
 #include <device/i2c_simple.h>
 #include <device/mmio.h>
 #include <soc/addressmap.h>

src/soc/mediatek/mt8183/spm.c

@@ -3,7 +3,6 @@
 #include <assert.h>
 #include <cbfs.h>
 #include <console/console.h>
-#include <delay.h>
 #include <device/mmio.h>
 #include <endian.h>
 #include <soc/emi.h>