leds: ledtrig-ide-disk: Make the driver explicitly non-modular

The Kconfig for this driver is currently:

config LEDS_TRIGGER_IDE_DISK
bool "LED IDE Disk Trigger"

...meaning that it currently is not being built as a module by anyone.
Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.

Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.

We also delete the MODULE_LICENSE tag etc. since all that information
is already contained at the top of the file in the comments.

Cc: Bryan Wu <[e-mail]>
Cc: Richard Purdie <[e-mail]>
Cc: [e-mail]
Signed-off-by: Paul Gortmaker <[e-mail]>
Signed-off-by: Jacek Anaszewski <[e-mail]>

drivers/leds/trigger/ledtrig-ide-disk.c

···
  *
  */
 
-#include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/leds.h>
···
 	led_trigger_register_simple("ide-disk", &ledtrig_ide);
 	return 0;
 }
-
-static void __exit ledtrig_ide_exit(void)
-{
-	led_trigger_unregister_simple(ledtrig_ide);
-}
-
-module_init(ledtrig_ide_init);
-module_exit(ledtrig_ide_exit);
-
-MODULE_AUTHOR("Richard Purdie <[e-mail]>");
-MODULE_DESCRIPTION("LED IDE Disk Activity Trigger");
-MODULE_LICENSE("GPL");
+device_initcall(ledtrig_ide_init);