doc: remove list of authors and point to github instead

this prevents the list of authors from getting stale or outdated,
by just relying on existing tools

AUTHORS.adoc

@@ -1,37 +0,0 @@
-= Authors and contributors
-
-- Simon Cruanes (`companion_cube`)
-- Drup (Gabriel Radanne)
-- Jacques-Pascal Deplaix
-- Nicolas Braud-Santoni
-- Whitequark (Peter Zotov)
-- hcarty (Hezekiah M. Carty)
-- struktured (Carmelo Piccione)
-- Bernardo da Costa
-- Vincent Bernardoff (vbmithr)
-- Emmanuel Surleau (emm)
-- Guillaume Bury (guigui)
-- JP Rodi
-- Florian Angeletti (@octachron)
-- Johannes Kloos
-- Geoff Gole (@gsg)
-- Roma Sokolov (@little-arhat)
-- Malcolm Matalka (`orbitz`)
-- David Sheets (@dsheets)
-- Glenn Slotte (glennsl)
-- @LemonBoy
-- Leonid Rozenberg (@rleonid)
-- Bikal Gurung (@bikalgurung)
-- Fabian Hemmer (copy)
-- Maciej Woś (@lostman)
-- Orbifx (Stavros Polymenis)
-- Rand (@rand00)
-- Dave Aitken (@actionshrimp)
-- Etienne Millon (@emillon)
-- Christopher Zimmermann (@madroach)
-- Jules Aguillon (@julow)
-- Metin Akat (@loxs)
-- Francois Berenger (@UnixJunkie)
-- Hongchang Wu (@hongchangwu)
-- Nathan Rebours (@NathanReb)
-- @rymdhund

README.md

@@ -244,6 +244,13 @@ PRs on github are very welcome (patches by email too, if you prefer so).
 <details>
 <summary>how to contribute (click to unfold)</summary>
 
+### List of authors
+
+The list of contributors can be seen [on github](https://github.com/c-cube/ocaml-containers/graphs/contributors).
+
+Alternatively, `git authors` from git-extras can be invoked from within the repo
+to list authors based on the git commits.
+
 ### First-Time Contributors
 
 Assuming your are in a clone of the repository: