staging: wilc1000: remove dead codes related to SIMULATION

This patch removes preprocessor conditionals (#ifdef or #ifndef) related
to SIMULATION definition from the codes becasue that SIMULATION feature is not
used anymore.

Signed-off-by: Tony Cho <tony.cho@atmel.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>