staging: wilc1000: coreconfigurator.h: remove unused defines

The define MAX_PACKET_BUFF_SIZE and STATUS_MSG_LEN is not used in the driver.
Delete two defines.

Signed-off-by: Glen Lee <glen.lee@atmel.com>
Signed-off-by: Tony Cho <tony.cho@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>