Remove scripts

It has done its job, let it rest in peace

web/scripts/find-unused-tr-keys.sh

@@ -1,14 +0,0 @@
-#!/bin/sh
-
-# Find localization keys that are possibly not being used.
-#
-# Caveat emptor. Uses a heuristic grep, not perfect.
-
-jq -r 'keys[]' packages/next/locales/en-US/translation.json | while read key
-do
-    if ! git grep --quiet --fixed '"'$key'"' -- :^'**/translation.json'
-    then
-        echo "possibly unused key ${key}"
-    fi
-done
-