staging: wfx: remove unused structure

struct hif_cnf_reset is not used anywhere in wfx. It's parent file
hif_api_cmd.h is imported form some other driver, hence some functions
in it are not used. This is one of them. Hence remove it.

Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
Link: https://lore.kernel.org/r/20200310142509.25632-7-kgupta@es.iitr.ac.in


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>