nilfs2: deleted inconsistent comment in nilfs_load_inode_block()

The comment says, "Caller of this function MUST lock s_inode_lock",
however just above the comment, it locks s_inode_lock in the function.

Signed-off-by: Jiro SEKIBA <jir@unicus.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 5040220..2a0a5a3 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -664,7 +664,6 @@
 	int err;
 
 	spin_lock(&sbi->s_inode_lock);
-	/* Caller of this function MUST lock s_inode_lock */
 	if (ii->i_bh == NULL) {
 		spin_unlock(&sbi->s_inode_lock);
 		err = nilfs_ifile_get_inode_block(sbi->s_ifile, inode->i_ino,