package/network-manager: remove leftover comment about headers
Commit 0a8ef2f3f7bc211d38a5a37007bdeb489bd37aae bumped the headers
version requirements, but did not update the associated comment.
Remove the comment entirely, as it does not apply anymore.
Signed-off-by: Raphaël Mélotte <raphael.melotte@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>