ACPI-EC: Drop unnecessary check made before calling acpi_ec_delete_query()

The acpi_ec_delete_query() function tests whether its argument is NULL
and then returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
[ rjw: Subject ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/ec.c

@@ -1103,7 +1103,7 @@ static int acpi_ec_query(struct acpi_ec *ec, u8 *data)
 	}
 
 err_exit:
-	if (result && q)
+	if (result)
 		acpi_ec_delete_query(q);
 	if (data)
 		*data = value;