afs dynroot: switch to simple_dir_operations

no point reinventing it (with wrong ->read(), BTW).
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/afs/dynroot.c

@@ -10,13 +10,6 @@
 #include <linux/dns_resolver.h>
 #include "internal.h"
 
-const struct file_operations afs_dynroot_file_operations = {
-	.open		= dcache_dir_open,
-	.release	= dcache_dir_close,
-	.iterate_shared	= dcache_readdir,
-	.llseek		= dcache_dir_lseek,
-};
-
 /*
  * Probe to see if a cell may exist.  This prevents positive dentries from
  * being created unnecessarily.

fs/afs/inode.c

@@ -443,7 +443,7 @@ struct inode *afs_iget_pseudo_dir(struct super_block *sb, bool root)
 	inode->i_mode		= S_IFDIR | S_IRUGO | S_IXUGO;
 	if (root) {
 		inode->i_op	= &afs_dynroot_inode_operations;
-		inode->i_fop	= &afs_dynroot_file_operations;
+		inode->i_fop	= &simple_dir_operations;
 	} else {
 		inode->i_op	= &afs_autocell_inode_operations;
 	}

fs/afs/internal.h

@@ -910,7 +910,6 @@ extern int afs_silly_iput(struct dentry *, struct inode *);
 /*
  * dynroot.c
  */
-extern const struct file_operations afs_dynroot_file_operations;
 extern const struct inode_operations afs_dynroot_inode_operations;
 extern const struct dentry_operations afs_dynroot_dentry_operations;