vfs: remove ".readlink = generic_readlink" assignments

If .readlink == NULL implies generic_readlink().

Generated by:

to_del="\.readlink.*=.*generic_readlink"
for i in `git grep -l $to_del`; do sed -i "/$to_del"/d $i; done

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

fs/nilfs2/namei.c

@@ -568,7 +568,6 @@ const struct inode_operations nilfs_special_inode_operations = {
 };
 
 const struct inode_operations nilfs_symlink_inode_operations = {
-	.readlink	= generic_readlink,
 	.get_link	= page_get_link,
 	.permission     = nilfs_permission,
 };