ubifs: remove error message in ubifs_xattr_get

There is a situation that other modules, like overlayfs, try to get
xattr value with a small buffer, if they get -ERANGE, they will try
again with the proper buffer size. No need to report an error.

Signed-off-by: Rock Lee <[e-mail]>
Signed-off-by: Richard Weinberger <[e-mail]>

fs/ubifs/xattr.c

···
 	if (buf) {
 		/* If @buf is %NULL we are supposed to return the length */
 		if (ui->data_len > size) {
-			ubifs_err(c, "buffer size %zd, xattr len %d",
-				  size, ui->data_len);
 			err = -ERANGE;
 			goto out_iput;
 		}