tools: remove genv8constants.py
Unused after commit aa3a572e ("build: remove dtrace & etw support") from last year. I had this vague notion that llnode also used it but that is another script.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Unused after commit aa3a572e ("build: remove dtrace & etw support") from last year. I had this vague notion that llnode also used it but that is another script.