tzcode2000g, gccdiffs is obsolete

[Joseph S. Myers]

tzcode2000g contains a file "gccdiffs" with patches against an antique
version of GCC (2.7.2.1) to check strftime formats against those accepted
by an antique version of glibc (1.09.1).  This file is completely
obsolete; GCC 2.95.2 (the current release) will check strftime formats,
and the format checking in GCC CVS (3.0-to-be) has been largely rewritten
to check properly C89, C99, X/Open and glibc 2.2 formats (printf, scanf
and strftime).

-- 
Joseph S. Myers
jsm28 at cam.ac.uk