Remove manpage for gl-info, as it no longer exists

from http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=698308

man/CMakeLists.txt

@@ -12,7 +12,6 @@ endif(${CMAKE_VERSION} VERSION_GREATER 2.8.4)
 
 set(MANPAGES
     fgfs.1
-    gl-info.1
 )
 
 if(WITH_FGPANEL)

man/gl-info.1.in

@@ -1,34 +0,0 @@
-.\" Copyright (C) 2002 Cameron Moore
-.\"
-.\" This program is free software; you can redistribute it and/or
-.\" modify it under the terms of the GNU General Public License
-.\" as published by the Free Software Foundation; either version 2
-.\" of the License, or (at your option) any later version.
-.\"
-.\" This program is distributed in the hope that it will be useful,
-.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
-.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-.\" GNU General Public License for more details.
-.\"
-.\" You should have received a copy of the GNU General Public License
-.\" along with this program; if not, write to the Free Software
-.\" Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-.\" Or try here: http://www.fsf.org/copyleft/gpl.html
-.\"
-.TH GL-INFO 1 "January 2002" "@VERSION@" "@PACKAGE@"
-.SH NAME
-gl\-info \- OpenGL test program for FlightGear
-.SH SYNOPSIS
-.B gl-info
-.SH DESCRIPTION
-.B gl-info
-is an OpenGL test program used to verify a valid OpenGL environment.
-.SH BUGS
-Send bug reports to <flightgear\-devel@lists.sourceforge.net> or visit
-<http://code.google.com/p/flightgear\-bugs>.
-.SH SEE ALSO
-fgfs(1), fgjs(1), fgpanel(1), js_demo(1), terrasync(1)
-.SH AUTHORS
-Curt L. Olson, et al.  See
-.I Thanks
-file for a list of contributors.