Remove extraneous dget/dput pair in vfs_unlink() that

confused the NFS client code wrt the exclusiveness of
a dentry getting removed.

fs/namei.c

@@ -1590,7 +1590,6 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)
 
 	DQUOT_INIT(dir);
 
-	dget(dentry);
 	down(&dentry->d_inode->i_sem);
 	if (d_mountpoint(dentry))
 		error = -EBUSY;
@@ -1600,7 +1599,6 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)
 			d_delete(dentry);
 	}
 	up(&dentry->d_inode->i_sem);
-	dput(dentry);
 
 	if (!error)
 		inode_dir_notify(dir, DN_DELETE);