staging: rtl8723bs: remove set but not used variable 'cck_highpwr'

staging: rtl8723bs: remove set but not used variable 'cck_highpwr'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/staging/rtl8723bs/hal/odm_HWConfig.c:
 In function odm_RxPhyStatus92CSeries_Parsing:
drivers/staging/rtl8723bs/hal/odm_HWConfig.c:92:5: warning:
 variable cck_highpwr set but not used [-Wunused-but-set-variable]

It is never used and can be removed.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190717142014.43216-1-yuehaibing@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>