out of date warnings

Andrew Dunstan <andrew@dunslane.net> writes:

I just noticed this code in win32.h and cygwin.h:
#if __GNUC__ && ! defined (__declspec)
#error You need egcs 1.1 or newer for compiling!
#endif

EGCS was merged back into gcc with the 2.95 release in 1999, according
to Wikipedia, So perhaps we should just remove these ancient relics, or
at least bring them up to date?

+1 for removing it.

regards, tom lane