Revert "Auxiliary commit to revert individual files from 4608b5e"

This reverts commit c95524dc777d273bc8fdc627a424e98d525565a8.

maintenance/gen_deps.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 set -e -o pipefail
 maintenance_dir="$(realpath $(dirname $0))"
 [ "$(which dune-deps)" != '' ] || (echo 'missing required executable "dune-deps"; try `opam install dune-deps`' && exit 1)