staging: rtl8188eu: remove two write-only hal components

RegTxPause and RegBcnCtrlVal from struct hal_data_8188e are set but
never read. Remove them.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210725155902.32433-11-martin@kaiser.cx


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