intel-hid: Remove duplicated acpi_remove_notify_handler

The second call to acpi_remove_notify_handler does not result in panic
or generate error messages, but it is unnecessary and the function
returns with an error. Remove the duplicate call. Correct two improperly
indented lines.

Signed-off-by: Alex Hung <alex.hung@canonical.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>