ref: semi-automated removal of unused request

[coolaj86]

A mostly automated removal of unused request vars:

1. Get a list of files referencing request that use github or githubish (which already use fetch)

   rg -F 'github(request' | grep '' | cut -d':' -f1 | sort -u > ref-request.sh

2. Add replaces to the beginning of each file

   sd -s 'github(request' 'github(null' _example/releases.js
   
   sd -s ' function (request) ' ' function () ' _example/releases.js
   
   sd -s "module.exports(require('@root/request'))" 'module.exports()' _example/releases.js