staging: wicl1000: remove function pointer wlan_handle_rx_que

The function pointer wlan_handle_rx_que is not called anywhere. Delete
wlan_handle_rx_que and it's assignment code.
But the function wilc_wlan_handle_rxq in assignment code is used. So leave it.

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>