nfsd4: remove outdated pathname-comments

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

fs/nfsd/acl.h

 /*
- *  include/linux/nfs4_acl.c
- *
  *  Common NFSv4 ACL handling definitions.
  *
  *  Copyright (c) 2002 The Regents of the University of Michigan.

fs/nfsd/idmap.h

 /*
- *  include/linux/nfsd_idmap.h
- *
  *  Mapping of UID to name and vice versa.
  *
  *  Copyright (c) 2002, 2003 The Regents of the University of