[PATCH][DOCS] Remove install-old.texi

[Joseph Myers]

On Tue, 18 May 2021, Martin Liška wrote:

> +@quotation
> +aix7.1, aix7.2, amdhsa, androideabi, aout, cygwin, darwin, darwin10, darwin7,
> +darwin8, darwin9, eabi, eabialtivec, eabisim, eabisimaltivec, elf, elf32,
> +elfbare, elfoabi, freebsd4, freebsd6, gnu, hpux, hpux10.1, hpux11.0, hpux11.3,
> +hpux11.9, linux, linux_altivec, lynxos, mingw32, mingw32crt, mmixware, msdosdjgpp,
> +musl, netbsd, netbsdelf, netbsdelf9, none, openbsd, qnx, rtems, solaris2.11,
> +symbianelf, tpf, uclibc, uclinux, uclinux_eabi, vms, vxworks, vxworksae,
> +vxworksmils
> +@end quotation

I'm not sure where this list comes from, but I'd expect "linux" to be the 
canonical "linux-gnu", along with "linux-uclibc", "linux-android", 
"linux-musl" ("uclibc" etc. aren't system names on their own) and variants 
with "eabi" or "eabihf" on the end (see what config.guess produces for 
Arm).

-- 
Joseph S. Myers
joseph@codesourcery.com