mb/google: Remove unused <string.h>

Found using:
diff <(git grep -l '#include <string.h>' -- src/) <(git grep -l 'STRINGIFY\|memcpy\|memmove\|memset\|memcmp\|memchr\|strdup\|strconcat\|strnlen\|strlen\|strchr\|strncpy\|strcpy\|strcmp\|strncmp\|strspn\|strcspn\|strstr\|strtok_r\|strtok\|atol\|strrchr\|skip_atoi\|snprintf' -- src/)|grep '<'

Change-Id: I3ba39077014c50c2dfb9fddf78813f1058c45cc1
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50685
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
diff --git a/src/mainboard/google/dedede/romstage.c b/src/mainboard/google/dedede/romstage.c
index f6a94ec..34810b4 100644
--- a/src/mainboard/google/dedede/romstage.c
+++ b/src/mainboard/google/dedede/romstage.c
@@ -6,7 +6,6 @@
 #include <memory_info.h>
 #include <soc/meminit.h>
 #include <soc/romstage.h>
-#include <string.h>
 #include <variant/gpio.h>
 
 void mainboard_memory_init_params(FSPM_UPD *memupd)
diff --git a/src/mainboard/google/hatch/romstage_spd_cbfs.c b/src/mainboard/google/hatch/romstage_spd_cbfs.c
index 8a12d70..eb5153c 100644
--- a/src/mainboard/google/hatch/romstage_spd_cbfs.c
+++ b/src/mainboard/google/hatch/romstage_spd_cbfs.c
@@ -6,7 +6,6 @@
 #include <memory_info.h>
 #include <soc/cnl_memcfg_init.h>
 #include <soc/romstage.h>
-#include <string.h>
 #include <variant/gpio.h>
 
 /*
diff --git a/src/mainboard/google/kukui/boardid.c b/src/mainboard/google/kukui/boardid.c
index 04ae7db..1174756 100644
--- a/src/mainboard/google/kukui/boardid.c
+++ b/src/mainboard/google/kukui/boardid.c
@@ -16,7 +16,6 @@
 #include <soc/auxadc_common.h>
 #include <soc/i2c.h>
 #include <soc/pmic_wrap_common.h>
-#include <string.h>
 
 /* For CBI un-provisioned/corrupted Flapjack board. */
 #define FLAPJACK_UNDEF_SKU_ID 0
diff --git a/src/mainboard/google/zork/variants/dirinboz/variant.c b/src/mainboard/google/zork/variants/dirinboz/variant.c
index 4dd371a..ebe2292 100644
--- a/src/mainboard/google/zork/variants/dirinboz/variant.c
+++ b/src/mainboard/google/zork/variants/dirinboz/variant.c
@@ -6,7 +6,6 @@
 #include <soc/pci_devs.h>
 #include <ec/google/chromeec/ec.h>
 #include <ec/google/chromeec/i2c_tunnel/chip.h>
-#include <string.h>
 
 /* FIXME: Comments seem to suggest these are not entirely correct. */
 static const fsp_ddi_descriptor non_hdmi_ddi_descriptors[] = {
diff --git a/src/mainboard/google/zork/variants/gumboz/variant.c b/src/mainboard/google/zork/variants/gumboz/variant.c
index 4dd371a..ebe2292 100644
--- a/src/mainboard/google/zork/variants/gumboz/variant.c
+++ b/src/mainboard/google/zork/variants/gumboz/variant.c
@@ -6,7 +6,6 @@
 #include <soc/pci_devs.h>
 #include <ec/google/chromeec/ec.h>
 #include <ec/google/chromeec/i2c_tunnel/chip.h>
-#include <string.h>
 
 /* FIXME: Comments seem to suggest these are not entirely correct. */
 static const fsp_ddi_descriptor non_hdmi_ddi_descriptors[] = {