staging: rtl8723bs: hal: remove unused variable in HalBtc8723b1Ant.c

staging: rtl8723bs: hal: remove unused variable in HalBtc8723b1Ant.c

Variable btRssiState in halbtc8723b1ant_ActionWifiConnectedBtAclBusy()
is set but never read. Removing it.

Removing this warning:

drivers/staging/rtl8723bs/hal/HalBtc8723b1Ant.c:2093:5: warning: variable ‘btRssiState’ set but not used [-Wunused-but-set-variable]

Signed-off-by: Edmundo Carmona Antoranz <eantoranz@gmail.com>
Link: https://lore.kernel.org/r/20210327001736.180881-3-eantoranz@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>