eliminate the "bindist" handling

[rjbs]

There's code like this in PAUSE::dist:

my $binary_dist;
# ftp://ftp.funet.fi/pub/CPAN/modules/05bindist.convention.html
$binary_dist = 1 if $dist =~ /\d-bin-\d+-/i;

That 05 file is long gone, it seems. I think this behavior is also long dead.

This issue is to remind me (rjbs) to kill off the code path.

[rjbs]

Addressed by rjbs/no-binary-dists