diff --git a/os/debian/copyright b/os/debian/copyright
deleted file mode 100644
--- a/os/debian/copyright
+++ /dev/null
@@ -1,106 +0,0 @@
-Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Upstream-Name: OpenTTD
-Upstream-Contact: info@openttd.org, #openttd on irc.oftc.net
-Source: http://www.openttd.org
-
-
-Files: *
-Copyright: © 2004-2019 Ludvig Strigeous and others.
-License: GPL-2.0
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License version 2.0 as
- published by the Free Software Foundation;
- .
- 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 package; if not, write to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
- .
- On Debian systems, the complete text of the GNU General Public License
- version 2 can be found in `/usr/share/common-licenses/GPL-2'.
-
-Files: src/3rdparty/squirrel/*
-Copyright: © 2003-2009 Alberto Demichelis
-License: Zlib
-
-Files: src/3rdparty/md5/*
-Copyright: © 1999, 2000, 2002 Aladdin Enterprises.  All rights reserved.
-License: Zlib
-
-
-License: Zlib
- 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.
- .
- Permission is granted to anyone to use this software for any purpose,
- including commercial applications, and to alter it and redistribute it
- freely, subject to the following restrictions:
- .
- 1. The origin of this software must not be misrepresented; you must not
- claim that you wrote the original software. If you use this software in
- a product, an acknowledgment in the product documentation would be
- appreciated but is not required.
- .
- 2. Altered source versions must be plainly marked as such, and must not
- be misrepresented as being the original software.
- .
- 3. This notice may not be removed or altered from any source
- distribution.
-
-Files: os/dos/exe2coff/*
-Copyright: © 1998 DJ Delorie
-License: GPL-2.0 with additional restrictions
- This document is Copyright (C) DJ Delorie and may be distributed
- verbatim, but changing it is not allowed.
- .
- Source code copyright DJ Delorie is distributed under the terms of the
- GNU General Public Licence, with the following exceptions:
- .
- * Sources used to build crt0.o, gcrt0.o, libc.a, libdbg.a, and
-   libemu.a are distributed under the terms of the GNU Library General
-   Public License, rather than the GNU GPL.
- .
- * Any existing copyright or authorship information in any given source
-   file must remain intact.  If you modify a source file, a notice to that
-   effect must be added to the authorship information in the source file.
- .
- * Runtime binaries, as provided by DJ in DJGPP, may be distributed
-   without sources ONLY if the recipient is given sufficient information
-   to obtain a copy of djgpp themselves.  This primarily applies to
-   go32-v2.exe, emu387.dxe, and stubedit.exe.
- .
- * Runtime objects and libraries, as provided by DJ in DJGPP, when
-   linked into an application, may be distributed without sources ONLY
-   if the recipient is given sufficient information to obtain a copy of
-   djgpp themselves.  This primarily applies to crt0.o and libc.a.
- .
- On Debian systems, the complete text of the GNU General Public License
- version 2 can be found in `/usr/share/common-licenses/GPL-2'.
-Comment:
- Given only the exe2coff.c file is distributed in the source distribution (and
- nothing in Debian binary distribution), it seems only the 2nd condition
- applies.
-
-Files: os/dos/cwsdpmi/*
-Source: http://homer.rice.edu/~sandmann/cwsdpmi/index.html
-Copyright: © 1995-2000 Charles W Sandmann (sandmann@clio.rice.edu)
-License: Custom binary-only license
- This is release 5.  The files in this binary distribution may be redistributed
- under the GPL (with source) or without the source code provided:
- .
- * CWSDPMI.EXE or CWSDPR0.EXE are not modified in any way except via CWSPARAM.
- .
- * CWSDSTUB.EXE internal contents are not modified in any way except via
-   CWSPARAM or STUBEDIT.  It may have a COFF image plus data appended to it.
- .
- * Notice to users that they have the right to receive the source code and/or
-   binary updates for CWSDPMI.  Distributors should indicate a site for the
-   source in their documentation.
-Comment:
- Files are distributed as binary only, so the second option in the license
- ("without source code provided: ...") is applicable.