thermal: delete "default y"

The generic thermal I/F gets selected by ACPI_THERMAL --
its only current customer.
it doesn't need to clutter other configs by default.

Signed-off-by: Len Brown <len.brown@intel.com>

drivers/thermal/Kconfig

@@ -4,7 +4,6 @@
 
 menuconfig THERMAL
 	bool "Generic Thermal sysfs driver"
-	default y
 	help
 	  Generic Thermal Sysfs driver offers a generic mechanism for
 	  thermal management. Usually it's made up of one or more thermal