tech debt: remove use of AbortController

[shazron]

aio-cli-plugin-app/src/BaseCommand.js

Lines 13 to 14 in fff2504

	const { AbortController } = require('node-abort-controller')
	global.AbortController = AbortController

AbortController was an emergency hotfix because some dependency updated to use node-14 at the time without bumping a major. AbortController was first in node 14.17