stand: Remove obsolete junk

[imp]

Summary

We long ago changed newvers.sh to make these comments bogus. Remove
them since every single one of them is broken after the $FreeBSD$
removal.

Sponsored by: Netflix

[jhb]

Does anything parse this file still, and if so, how does it parse it?

[imp]

In D45879#1047007, @jhb wrote:

Does anything parse this file still, and if so, how does it parse it?

Since 1998, i think, we've just looked at the first line starting with a number. And that's only to bake the version into vers.sh.