staging: r8188eu: remove the "dump tx packet" fragments

Remove the code fragments for printing outgoing packets.

There's only a hal variable HAL_DEF_DBG_DUMP_TXPKT and the bDumpTxPkt
component of struct hal_data_8188e.

The hal variable is set by a private ioctl, it's never read.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220330201210.175941-3-martin@kaiser.cx


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