Remove `DELETE_NAME` instruction

[markshannon]

Feature or enhancement

Proposal:

With a couple of small modifications to STORE_NAME it can be made to handle a NULL value.
Then DELETE_NAME can be replaced with PUSH_NULL; STORE_NAME

STORE_NAME is executed about 1 in 100k instructions and DELETE_NAME about 1 in a billion according to our stats, so we can save an opcode with no performance impact.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-145854: Replace DELETE_NAME with PUSH_NULL; STORE_NAME #146006