USB: serial: quatech2.c: remove debug module parameter

Now that the dbg() macro is no longer being used in the driver,
the debug module parameter doesn't do anything at all.  So remove
it so as to not confuse people.

CC: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/quatech2.c

@@ -27,8 +27,6 @@
 #include <linux/serial_reg.h>
 #include <linux/uaccess.h>
 
-static bool debug;
-
 /* default urb timeout for usb operations */
 #define QT2_USB_TIMEOUT USB_CTRL_SET_TIMEOUT
 
@@ -1146,6 +1144,3 @@ module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
-
-module_param(debug, bool, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug, "Debug enabled or not");