staging: rtl8821ae: Fix halbtc8192e2ant.c 'defined but not used' sparse warnings

Sparse complains about halbtc8192e2ant_low_penalty_ra() not being used,
and subsequently halbtc8192e2ant_set_sw_penalty_tx_rateadaptive() when
this is removed. remove both functions.

Signed-off-by: Mark Einon <mark@einon.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/rtl8821ae/btcoexist/halbtc8192e2ant.c
Simple merge