staging: r8188eu: remove rtw_sctx_chk_waring_status function

Remove the rtw_sctx_chk_waring_status function from core/rtw_amit.c,
as it has only one caller which is unnecessary.

Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20220216010709.791-14-phil@philpotter.co.uk


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