Simplified license.

In https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=714058#55 John Dunning writes on 4/May/2015:

"Hi all.  I gather that the preference is to license CC65 and
associated technologies under the zlib license.  I hereby give my
approval for any software written by me as part of CC65 and associated
technologies under the zlib license."

The above together with the fact that all subsequent work on cc65 was already licensed under the zlib license means that cc65 can now be licensed altogether under the zlib license.

Author: oliverschmidt

LICENSE

@@ -1,44 +1,3 @@
-This is the original cc65 compiler copyright:
-
-  -*- Mode: Text -*-
-
-     This is the copyright notice for RA65, LINK65, LIBR65, and other
-  Atari 8-bit programs.  Said programs are Copyright 1989, by John R.
-  Dunning.  All rights reserved, with the following exceptions:
-
-      Anyone may copy or redistribute these programs, provided that:
-
-  1:  You don't charge anything for the copy.  It is permissable to
-      charge a nominal fee for media, etc.
-
-  2:  All source code and documentation for the programs is made
-      available as part of the distribution.
-
-  3:  This copyright notice is preserved verbatim, and included in
-      the distribution.
-
-      You are allowed to modify these programs, and redistribute the
-  modified versions, provided that the modifications are clearly noted.
-
-      There is NO WARRANTY with this software, it comes as is, and is
-  distributed in the hope that it may be useful.
-
-      This copyright notice applies to any program which contains
-  this text, or the refers to this file.
-
-      This copyright notice is based on the one published by the Free
-  Software Foundation, sometimes known as the GNU project.  The idea
-  is the same as theirs, ie the software is free, and is intended to
-  stay that way.  Everybody has the right to copy, modify, and re-
-  distribute this software.  Nobody has the right to prevent anyone
-  else from copying, modifying or redistributing it.
-
-In acknowledgment of this copyright, I (Ullrich von Bassewitz) will place
-my own changes to the compiler under the same copyright.
-
-The library and the binary utils are a complete rewrite done by me and
-covered by the following license:
-
 This software is provided 'as-is', without any express or implied warranty.
 In no event will the authors be held liable for any damages arising from
 the use of this software.