Reason for this: Had a customer ticket where they had inquiries about this file: https://github.com/PagerDuty/API_Python_Examples/blob/master/EVENTS_API_v2/trigger/trigger_with_incident_key.py

Felt there was some improvements I could help with.

Overview of what I did:

1. I saw some refactoring I could help with. Big one IMO is that I removed the need to enter the subdomain / api access key for Events API.
2. I deleted the REST V1 API files due to the decommission.
3. I renamed INTEGRATION API to EVENTS V1 API.