Clean up the dtrace code and documentation for the hook is not using

Bug report

Bug description:

8 years ago, @ambv add dtrace support in CPython in https://github.com/python/cpython/commit/a785c87d6eacbed81543a8afe3cb098fabb9610a

For now, after check the code, I think the point following below is not used in CPython code

• function__entry
• function__return
• instance__new__start
• instance__new__done
• instance__delete__start
• instance__delete__done
• line

I think we need to clean up the code and the document in https://docs.python.org/3/howto/instrumentation.html

cc @markshannon

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-126246

首先查看 CPython 的 DTrace 支持以及 docs.python.org/3/howto/instrumentation.html 上的 instrumentation HOWTO，重点关注其中列出的 hooks。开始前检查关联的 PR gh-126246；未使用的 hooks 及其文档得到一致处理即表示完成。