platform/x86: intel-vbtn: Remove redundant inclusions

Some headers are not needed since the driver can be built as module.
Remove them.

While here, sort headers alphabetically.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Darren Hart (VMware) <dvhart@infradead.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/x86/intel-vbtn.c

@@ -16,15 +16,13 @@
  *
  */
 
+#include <linux/acpi.h>
+#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/init.h>
-#include <linux/input.h>
 #include <linux/platform_device.h>
-#include <linux/input/sparse-keymap.h>
-#include <linux/acpi.h>
 #include <linux/suspend.h>
-#include <acpi/acpi_bus.h>
 
 /* When NOT in tablet mode, VGBS returns with the flag 0x40 */
 #define TABLET_MODE_FLAG 0x40