git: igb: Remove unused code; adjust and add comment

[Sepherosa Ziehau]

commit 66c68b4b9b3dfa900fcdb6b52f03ddd175c0d296
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Tue Aug 14 16:17:24 2012 +0800

    igb: Remove unused code; adjust and add comment

Summary of changes:
 sys/dev/netif/igb/if_igb.c |   22 ++++++----------------
 1 files changed, 6 insertions(+), 16 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/66c68b4b9b3dfa900fcdb6b52f03ddd175c0d296


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