Remove news from libstdc++ web page

[Benjamin Kosnik]

> This might be a bit radical, but I'd like to propose removing the News
> entries from http://gcc.gnu.org/libstdc++/.  The latest entry is over
> four years old.  We have an appropriate place for libstdc++ news,
> namely the News entries on http://gcc.gnu.org/.  The existing News has
> confused at least one person writing to gcc-help.
> 
> Is this patch OK?

Yes, please do this!

-benjamin