Remove infinityAgent when Node 0.10 is deprecated

[sindresorhus]

Just putting it in an issue instead of a inline TODO.

got/index.js

Lines 93 to 102 in e3897a0

	if (process.version.indexOf('v0.10') === 0 && fn === https && (
	typeof opts.ca !== 'undefined' ||
	typeof opts.cert !== 'undefined' ||
	typeof opts.ciphers !== 'undefined' ||
	typeof opts.key !== 'undefined' ||
	typeof opts.passphrase !== 'undefined' ||
	typeof opts.pfx !== 'undefined' ||
	typeof opts.rejectUnauthorized !== 'undefined')) {
	arg.agent = new (infinityAgent.https.Agent)(opts);
	}