cros_ec: Drop cros_ec_entering_mode()

This function is not needed anymore. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/misc/cros_ec.c b/drivers/misc/cros_ec.c
index 0818ef8..2a15094 100644
--- a/drivers/misc/cros_ec.c
+++ b/drivers/misc/cros_ec.c
@@ -754,17 +754,6 @@
 	return 0;
 }
 
-int cros_ec_entering_mode(struct udevice *dev, int mode)
-{
-	int rc;
-
-	rc = ec_command(dev, EC_CMD_ENTERING_MODE, 0, &mode, sizeof(mode),
-			NULL, 0);
-	if (rc)
-		return -1;
-	return 0;
-}
-
 static int cros_ec_check_version(struct udevice *dev)
 {
 	struct cros_ec_dev *cdev = dev_get_uclass_priv(dev);
diff --git a/drivers/misc/cros_ec_sandbox.c b/drivers/misc/cros_ec_sandbox.c
index beea47c..ab91f3f 100644
--- a/drivers/misc/cros_ec_sandbox.c
+++ b/drivers/misc/cros_ec_sandbox.c
@@ -496,9 +496,6 @@
 	case EC_CMD_MKBP_STATE:
 		len = cros_ec_keyscan(ec, resp_data);
 		break;
-	case EC_CMD_ENTERING_MODE:
-		len = 0;
-		break;
 	case EC_CMD_GET_NEXT_EVENT: {
 		struct ec_response_get_next_event *resp = resp_data;
 
diff --git a/include/cros_ec.h b/include/cros_ec.h
index 9dab6cd..ef89def 100644
--- a/include/cros_ec.h
+++ b/include/cros_ec.h
@@ -199,15 +199,6 @@
 			  struct ec_response_flash_protect *resp);
 
 /**
- * Notify EC of current boot mode
- *
- * @param dev		CROS-EC device
- * @param vboot_mode    Verified boot mode
- * @return 0 if ok, <0 on error
- */
-int cros_ec_entering_mode(struct udevice *dev, int mode);
-
-/**
  * Run internal tests on the cros_ec interface.
  *
  * @param dev		CROS-EC device