Remove old script

We use Github to draft releases these days.

script/release-notes-template

@@ -1,22 +0,0 @@
-#!/bin/sh
-
-# Lists all PRs for the next release in a neat list to copy into the release
-# template. It also opens all PRs in Firefox so that you can find the release
-# notes.
-
-git fetch upstream
-latest="$(git tag --sort="-v:refname" | head -1)"
-
-echo "Changes since last release $latest:"
-
-pr_numbers() {
-	git log "$latest.." --merges --oneline |\
-        grep -oP 'Merge pull request #\K[0-9]+(?= from)'
-}
-
-pr_numbers |\
-       while read n; do echo "https://github.com/openfoodfoundation/openfoodnetwork/pull/$n"; done |\
-       xargs firefox
-
-pr_numbers |\
-       while read n; do echo "- #$n "; done