emulators: remove 'Created by' lines

A big Thank You to the original contributors of these ports:

  *  Akinori MUSHA aka knu <knu@idaemons.org>
  *  Alejandro Pulver <alejandro@varnet.biz>
  *  Alexander Best <arundel@gmx.net>
  *  Alexander Nedotsukov <bland@FreeBSD.org>
  *  Alexey Dokuchaev <danfe@FreeBSD.org>
  *  Alexey V. Antipovsky <kemm@in-line.ru>
  *  Alonso Cardenas Marquez <acm@FreeBSD.org>
  *  Brian Gaeke <brg@dgate.org>
  *  Danilo Egea Gondolfo <danilo@FreeBSD.org>
  *  David Naylor <naylor.b.david@gmail.com>
  *  David O'Brien (obrien@cs.ucdavis.edu)
  *  Edward Tomasz Napierala <trasz@FreeBSD.org>
  *  Eric L. Hernes <erich@FreeBSD.org>
  *  Felix Palmen <felix@palmen-it.de>
  *  Ganael Laplanche <ganael.laplanche@martymac.org>
  *  Gerald Pfeifer <gerald@FreeBSD.org>
  *  Gunter Wambaugh <techgunter@yahoo.com>
  *  Jacques Vidrine <nectar@FreeBSD.org>
  *  Janni
  *  Jeffrey H. Johnson <CPE1704TKS@bellsouth.net>
  *  Jeremy Karlson
  *  Jeroen Ruigrok van der Werven <asmodai@FreeBSD.org>
  *  Joel Sutton <jsutton@webnet.com.au>
  *  Joerg Wunsch <joerg@FreeBSD.org>
  *  Jonathan M. Bresler (jmb)
  *  Jose Alonso Cardenas Marquez <acm@FreeBSD.org>
  *  Juergen Lock <nox@jelal.kn-bremen.de>
  *  Kaltashkin Eugene <zhecka@gmail.com>
  *  Kevin Bowling <kbowling@FreeBSD.org>
  *  Li-Lun Wang <llwang@infor.org>
  *  Mario S F Ferreira <lioux@linf.unb.br> et al.
  *  Martin Hinner
  *  Maxim Sobolev <sobomax@FreeBSD.org>
  *  Michael Neumann <mneumann@ntecs.de>
  *  Miguel Mendez <flynn@energyhq.homeip.net>
  *  Naram Qashat <cyberbotx@cyberbotx.com>
  *  Nicole Reid <root@cooltrainer.org>
  *  Nishika <nishika@cheerful.com>
  *  Pavel I Volkov <pavelivolkov@googlemail.com>
  *  Piotr Kubaj
  *  Ruan Wei (iamayan@gmail.com)
  *  Sebastian Schuetz <sschuetz@fhm.edu>
  *  Seiichirou Hiraoka
  *  Shaun Amott <shaun@FreeBSD.org>
  *  Sheldon Hearn <axl@iafrica.com>
  *  Simon Dick <simond@irrelevant.org>
  *  Steven Kreuzer <skreuzer@FreeBSD.org>
  *  Stijn Hoop <stijn@win.tue.nl>
  *  Sunpoet Po-Chuan Hsieh <sunpoet@FreeBSD.org>
  *  Thomas Bernard <nanard@free.fr>
  *  Timothy Beyer <beyert@cs.ucr.edu>
  *  Tobias Reifenberger <tr@freebsd.mayn.de>
  *  Tom Carrick <knyghtmare@knyghtmare.com>
  *  Travis Poppe <tlp@liquidx.org>
  *  Uffe Jakobsen <uffe@uffe.org>
  *  Vladimir Kondratiev <wulf@mail.mipt.ru>
  *  Yukihiro Nakai <Nakai@Mlab.t.u-tokyo.ac.jp>
  *  Yukihiro Nakai <nakai@FreeBSD.org>
  *  alepulver
  *  alex
  *  dchapes@ddm.on.ca
  *  dk
  *  elbarto
  *  janek@gaja.ipan.lublin.pl
  *  jhb
  *  jmz
  *  joerg
  *  jraynard
  *  krion
  *  kstailey
  *  mbr@FreeBSD.org
  *  okeeblow <root@cooltrainer.org>
  *  pixel
  *  pjm
  *  tenser@spitfire.ecsel.psu.edu
  *  trasz
  *  trasz <trasz@pin.if.uz.zgora.pl>
  * # Created by Timothy Beyer <beyert@cs.ucr.edu>

With hat:	portmgr