[aur-requests] Removal request: stxxl and stxxl-svn.

[Karol Blazewicz]

[1] https://aur.archlinux.org/packages/libstxxl/
[2] https://aur.archlinux.org/packages/stxxl/
[3] https://aur.archlinux.org/packages/stxxl-svn/

The latter two are orphaned, none has any votes.
stxxl seems to be using git and not svn anymore
http://stxxl.sourceforge.net/ -> https://github.com/stxxl/stxxl
[2] has been submitted by the same person as [1], so I guess he
decided to change the name. Their PKGBUILDs differ a bit though.

Can we keep [1] and remove [2] and [3]?