staging: rtl8188eu: remove useless comment

Remove block comment about function HwSuspendModeEnable92Cu.
The comment contains no useful information and there is even
no HwSuspendModeEnable92Cu function in the driver code.
'git grep -n HwSuspendModeEnable92Cu drivers/staging/rtl8188eu'
returns nothing.

Reviewed-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210619175055.5122-1-straube.linux@gmail.com


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