Remove deprecated Py_TRASHCAN_SAFE_BEGIN/ Py_TRASHCAN_SAFE_END

[iritkatriel]

Py_TRASHCAN_SAFE_BEGIN/ Py_TRASHCAN_SAFE_END were deprecated in 3.11, to be replaced by Py_TRASHCAN_BEGIN/Py_TRASHCAN_END which were added in 3.8. The deprecated macros are flawed (can lead to a crash) so we should not delay their removal.

For more history, see https://mail.python.org/archives/list/python-dev@python.org/message/KWFX6XX3HMZBQ2BYBVL7G74AIOPWO66Y/.

Linked PRs

• gh-105111: remove deprecated macros Py_TRASHCAN_SAFE_BEGIN and Py_TRASHCAN_SAFE_END #105112