cruft from the py3.8 era

[drammock]

per the # TODO comment, patch is needed here too?

mne-python/mne/utils/misc.py

Lines 35 to 41 in 0a88d41

	# TODO: no longer needed when py3.9 is minimum supported version
	def _empty_hash(kind="md5"):
	func = getattr(hashlib, kind)
	if "usedforsecurity" in inspect.signature(func).parameters:
	return func(usedforsecurity=False)
	else:
	return func()

Originally posted by @varunkasyap in #13561 (comment)

[drammock]

@varunkasyap do you want to tackle this one too?

[varunkasyap]

@varunkasyap do you want to tackle this one too?

Hi @drammock ,
Yes, willing to contribute