[UX] Ditch the sidebar?

[arrdem]

One mistake in Grimoire is that there is no analytics of what links on what pages get used. However just from a utility perspective most of the options on the (hidden by default) sidebar don't add a lot of value.

Maybe more value could be added if the sidebar links to old Clojure versions constrained the cheatsheet and the search bar to results in that version, but with their current behavior of just linking to the index pages of those artifacts they aren't very useful.