astro: remove 'Created by' lines

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

  *  ABURAYER Rewsirow <rewsirow@ff.iij4u.or.jp>
  *  Alexander Leidinger
  *  Alexey Dokuchaev <danfe@FreeBSD.org>
  *  Andrew Pantyukhin <infofarmer@FreeBSD.org>
  *  Andrey Zakhvatov
  *  Anton Berezin <tobez@FreeBSD.org>
  *  Anton Berezin <tobez@tobez.org>
  *  Anton Karpov <toxa@toxahost.ru>
  *  Brion Moss <brion@queeg.com>
  *  Bruce M Simpson <bms@FreeBSD.org>
  *  Chris Piazza <cpiazza@FreeBSD.org>
  *  Christian Brueffer <chris@unixpages.org>
  *  David Wolfskill
  *  Frank W. Josellis <frank@dynamical-systems.org>
  *  Gea-Suan Lin <gslin@gslin.org>
  *  Gleb Smirnoff <glebius@FreeBSD.org>
  *  Hye-Shik Chang <perky@fallin.lv>
  *  Jan Srzednicki <w@wrzask.pl>
  *  Jean-Yves Lefort <jylefort@FreeBSD.org>
  *  Jean-Yves Lefort <jylefort@brutele.be>
  *  Jeremy Shaffner <jeremy@external.org>
  *  Keith Walker <kew@icehouse.net>
  *  Kirill Ponomarew <ponomarew@oberon.net>
  *  Kris Kennaway <kkennawa@physics.adelaide.edu.au>
  *  Kris Kennaway <kris@FreeBSD.org
  *  Laurent Courty
  *  Loïc BARTOLETTI <lbartoletti@FreeBSD.org>
  *  Lukas Maly <Iam@LukasMaly.NET>
  *  Markus Brueffer <markus@FreeBSD.org>
  *  Mathias Monnerville <mathias@monnerville.com>
  *  Muhammad Moinur Rahman <bofh@FreeBSD.org>
  *  Patrick Li <pat@FreeBSD.org>
  *  Patrick Li <pat@databits.net>
  *  Piero Serini <piero@FreeBSD.org>
  *  Po-Chuan Hsieh <sunpoet@FreeBSD.org>
  *  Simon Olofsson <simon@olofsson.de>
  *  Slaven Rezic <slaven@rezic.de>
  *  Sunpoet Po-Chuan Hsieh <sunpoet@FreeBSD.org>
  *  Sunpoet Po-Chuan Hsieh <sunpoet@sunpoet.net>
  *  Sébastien Santoro <dereckson@gmail.com>
  *  TAKATSU Tomonari <tota@FreeBSD.org>
  *  Tatsuki Makino <tatsuki_makino@hotmail.com>
  *  Tony Maher <tonymaher@optusnet.com.au>
  *  Wen Heping <wen@FreeBSD.org>
  *  Wen Heping <wenheping@gmail.com>
  *  Wen Heping<wen@FreeBSD.org>
  *  Will Andrews <andrews@technologist.com>
  *  asami
  *  chuck@pkix.net
  *  crwhipp@gmail.com
  *  darius@dons.net.au
  *  db
  *  erich@FreeBSD.org
  *  freebsd-ports@henrik.synth.no
  *  ijliao
  *  nwhitehorn
  *  pat
  *  searle
  *  thierry@pompo.net
  *  torstenb
  *  trevor
  *  will

With hat:	portmgr

astro/R-cran-maptools/Makefile

-# Created by: TAKATSU Tomonari <tota@FreeBSD.org>
-
 PORTNAME=	maptools
 DISTVERSION=	1.1-4
 CATEGORIES=	astro

astro/accrete/Makefile

-# Created by: chuck@pkix.net
-
 PORTNAME=	accrete
 PORTVERSION=	1.0
 CATEGORIES=	astro

astro/astrometry/Makefile

-# Created by: Sébastien Santoro <dereckson@gmail.com>
-
 PORTNAME=	astrometry
 PORTVERSION=	0.89
 PORTREVISION=	3

astro/celestia-gtk/Makefile

-# Created by: Jean-Yves Lefort <jylefort@FreeBSD.org>
-
 CELESTIA_UI=	gtk
 MASTERDIR=	${.CURDIR}/../celestia
 

astro/celestia/Makefile

-# Created by: trevor
-
 PORTNAME=	celestia
 PORTVERSION=	1.6.1
 PORTREVISION=	13

astro/cfitsio/Makefile

-# Created by: Markus Brueffer <markus@FreeBSD.org>
-
 PORTNAME=	cfitsio
 PORTVERSION=	4.1.0
 PORTREVISION=	1

astro/fowsr/Makefile

-# Created by: Alexander Leidinger
-
 PORTNAME=	fowsr
 PORTVERSION=	${FILEVER}
 CATEGORIES=	astro

astro/foxtrotgps/Makefile

-# Created by: crwhipp@gmail.com
-
 PORTNAME=	foxtrotgps
 PORTVERSION=	1.2.2
 PORTREVISION=	4

astro/geographiclib/Makefile

-# Created by: Tatsuki Makino <tatsuki_makino@hotmail.com>
-
 PORTNAME=	geographiclib
 DISTVERSION=	1.52
 CATEGORIES=	astro

astro/gkrellmoon2/Makefile

-# Created by: Jan Srzednicki <w@wrzask.pl>
-
 PORTNAME=	gkrellmoon2
 PORTVERSION=	0.6
 PORTREVISION=	10

astro/gnuastro/Makefile

-# Created by: Alexey Dokuchaev <danfe@FreeBSD.org>
-
 PORTNAME=	gnuastro
 PORTVERSION=	0.17
 CATEGORIES=	astro

astro/gpsbabel/Makefile

-# Created by: Laurent Courty
-
 PORTNAME=	gpsbabel
 DISTVERSIONPREFIX=	${PORTNAME}_
 DISTVERSION=	1_7_0

astro/gpsbabel14/Makefile

-# Created by: Laurent Courty
-
 PORTNAME=	gpsbabel
 PORTVERSION=	1.4.4
 PORTREVISION=	1

astro/gpscorrelate/Makefile

-# Created by: Lukas Maly <Iam@LukasMaly.NET>
-
 PORTNAME=	gpscorrelate
 PORTVERSION=	1.6.1
 PORTREVISION=	9

astro/gpsd/Makefile

-# Created by: Anton Karpov <toxa@toxahost.ru>
-
 PORTNAME=	gpsd
 PORTVERSION=	3.23.1
 CATEGORIES=	astro geography

astro/gpsman/Makefile

-# Created by: David Wolfskill
-
 PORTNAME=	gpsman
 PORTVERSION=	6.4.4.2
 CATEGORIES=	astro tk geography

astro/gpstk/Makefile

-# Created by: Bruce M Simpson <bms@FreeBSD.org>
-
 PORTNAME=	gpstk
 PORTVERSION=	8.0.0
 DISTVERSIONPREFIX=	v

astro/gpxloggerd/Makefile

-# Created by: Gleb Smirnoff <glebius@FreeBSD.org>
-
 PORTNAME=	gpxloggerd
 PORTVERSION=	0.2.5
 CATEGORIES=	astro

astro/josm/Makefile

-# Created by: Gleb Smirnoff <glebius@FreeBSD.org>
-
 PORTNAME=	josm
 PORTVERSION=	18513
 CATEGORIES=	astro java

astro/kosmorro/Makefile

-# Created by: thierry@pompo.net
-
 PORTNAME=	kosmorro
 PORTVERSION=	0.10.10
 CATEGORIES=	astro python