inode->i_op is never NULL

We used to have rather schizophrenic set of checks for NULL ->i_op even
though it had been eliminated years ago.  You'd need to go out of your
way to set it to NULL explicitly _and_ a bunch of code would die on
such inodes anyway.  After killing two remaining places that still
did that bogosity, all that crap can go away.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/stat.c b/fs/stat.c
index 7c46fbe..7e12a6f8 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -305,7 +305,7 @@
 		struct inode *inode = path.dentry->d_inode;
 
 		error = -EINVAL;
-		if (inode->i_op && inode->i_op->readlink) {
+		if (inode->i_op->readlink) {
 			error = security_inode_readlink(path.dentry);
 			if (!error) {
 				touch_atime(path.mnt, path.dentry);