staging: r8188eu: remove handlerOS independent comment

The "need to make timeout handlerOS independent" comment is incorrect.
Remove the comment to avoid misleading developers.

Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Rebecca Mckeever <remckee0@gmail.com>
Link: https://lore.kernel.org/r/YkXwwfYBE+P0UObq@bertie


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