[issue40939] Remove the old parser

[Lysandros Nikolaou]

Change by Lysandros Nikolaou <lisandrosnik at gmail.com>:


----------
pull_requests: +19996
pull_request: https://github.com/python/cpython/pull/20800

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40939>
_______________________________________