fs: ext4: Remove unused parameter from ext4_mount

The part_length parameter is not used. Remove it.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
diff --git a/env/ext4.c b/env/ext4.c
index 47e05a4..da26705 100644
--- a/env/ext4.c
+++ b/env/ext4.c
@@ -77,7 +77,7 @@
 	dev = dev_desc->devnum;
 	ext4fs_set_blk_dev(dev_desc, &info);
 
-	if (!ext4fs_mount(info.size)) {
+	if (!ext4fs_mount()) {
 		printf("\n** Unable to use %s %s for saveenv **\n",
 		       ifname, dev_and_part);
 		return 1;
@@ -160,7 +160,7 @@
 	dev = dev_desc->devnum;
 	ext4fs_set_blk_dev(dev_desc, &info);
 
-	if (!ext4fs_mount(info.size)) {
+	if (!ext4fs_mount()) {
 		printf("\n** Unable to use %s %s for loading the env **\n",
 		       ifname, dev_and_part);
 		goto err_env_relocate;