staging: emxx_udc: remove unused variable driver_desc

When building with W=1 (or however you found it), there is a warning
that this variable is unused.

It is not used so remove it to fix the warning.
Signed-off-by: Sean Behan <codebam@riseup.net>
Link: https://lore.kernel.org/r/20210217142118.7107-1-codebam@riseup.netSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/emxx_udc/emxx_udc.c

@@ -38,7 +38,6 @@ static struct gpio_desc *vbus_gpio;
 static int vbus_irq;
 
 static const char	driver_name[] = "emxx_udc";
-static const char	driver_desc[] = DRIVER_DESC;
 
 /*===========================================================================*/
 /* Prototype */