gh-88929: remove outdated reference to Py_USING_MEMORY_DEBUGGER

[fbidu]

Small fix, removes a line that's no longer necessary

https://bugs.python.org/issue44766

• Issue: [easy doc] Remove redundant info in README.valgrind #88929

[shihai1991]

Thanks for your update.

[fbidu]

thanks for the review, @shihai1991

[shihai1991]

Hm, I haven't the merge right.
Hi, Victor. This is a small change of docs. Would you mind to take a look when you have free time? Thanks. @vstinner

[ammaraskar]

For reference, this was removed as part of: 3924f93

Note that there are still references to Py_USING_MEMORY_DEBUGGER in:

cpython/Misc/valgrind-python.supp

Lines 10 to 11 in bb3e0c2

	# You must edit Objects/obmalloc.c and uncomment Py_USING_MEMORY_DEBUGGER
	# to use the preferred suppressions with address_in_range.

and

cpython/Python/dtoa.c

Line 333 in bb3e0c2

#ifndef Py_USING_MEMORY_DEBUGGER

These stale references should probably be removed as well.

[github-actions]

This PR is stale because it has been open for 30 days with no activity.

[vstinner]

Please address Ammar's comment.

[fbidu]

oh, sorry @vstinner, this fell off of my radar. Will do now

[fbidu]

Done, hope I didn't break the C directives with this...

[vstinner]

@mdickinson: Should we add a new macro to enable or disable the freelist, for debug purposes?

[arhadthedev]

This PR is a de-facto continuation of gh-30284.

[arhadthedev]

@benjaminp (as the merger of gh-30284 that removed not all references indeed).