staging: dgnc: delete serial_num board variable

No one was even ever setting the thing, so just remove it.

Cc: Lidza Louina <lidza.louina@gmail.com>
Cc: Mark Hounschell <markh@compro.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2018-01-15 21:00:06 +01:00
commit 1971a95179