refactor(bl): remove un-necessary variable

Remove un-necessary variable 'is_parent_image'
used in the 'load_auth_image_recursive' function.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: Ie66f7e3cc82dd443da0b75d55adf3ae7e15b5f99
diff --git a/common/bl_common.c b/common/bl_common.c
index 2a9f32f..2c452aa 100644
--- a/common/bl_common.c
+++ b/common/bl_common.c
@@ -150,8 +150,7 @@
  * of trust.
  */
 static int load_auth_image_recursive(unsigned int image_id,
-				    image_info_t *image_data,
-				    int is_parent_image)
+				    image_info_t *image_data)
 {
 	int rc;
 	unsigned int parent_id;
@@ -159,7 +158,7 @@
 	/* Use recursion to authenticate parent images */
 	rc = auth_mod_get_parent_id(image_id, &parent_id);
 	if (rc == 0) {
-		rc = load_auth_image_recursive(parent_id, image_data, 1);
+		rc = load_auth_image_recursive(parent_id, image_data);
 		if (rc != 0) {
 			return rc;
 		}
@@ -193,7 +192,7 @@
 {
 #if TRUSTED_BOARD_BOOT
 	if (dyn_is_auth_disabled() == 0) {
-		return load_auth_image_recursive(image_id, image_data, 0);
+		return load_auth_image_recursive(image_id, image_data);
 	}
 #endif