Drop non-normative CSS2 formats

[gsnedders]

From current CSS2: "This document is also available in these non-normative formats: plain text, gzip'ed tar file, zip file, gzip'ed PostScript, PDF. See also translations."

Given we haven't published anything else in any of these formats forever, I'd rather drop all of them (especially because I don't want to deal with any bugs in the PDF/PS generation!). If we publish any non-normative version, it should be a single-page edition of the spec.

If anyone objects, shout.

[tabatkins]

Strong agree.

[frivoal]

I'd keep the link to translations, but the dropping the alternative formats is OK with me. If we think there's value in having these (and I am far from convinced), we should get the systems team to offer it across the board for all TR documents through some kind of unified system, instead of maintaining per-spec converters.

[svgeesus]

Yes, very much agree, drop them.