Splay benchmark results are missing

[linusg]

I'm pretty sure they used to be on there before 👀

[linusg]

Looks like this was caused by #196, the data for the splay benchmark is not present in https://boa-api.jason-williams.co.uk/benchmarks. The source for that doesn't seem to be public.

[jedel1043]

cc @jasonwilliams, maybe there's a problem with the backend