kukui: undef I2C console commands to save some flash.
kukui: undef I2C console commands to save some flash.

DO NOT CHERRY-PICK to firmware branch.

BUG=none
TEST=make BOARD=kodama, and get 1k extra flash size
BRANCH=main

Change-Id: I1f0205cd9c149bced3be496768a0d7000f0b61b7
Signed-off-by: Eric Yilun Lin <2f2733c7206ea2b76bd2db1905cc5e8a75841c48@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2597135
Reviewed-by: Ting Shen <c671d3efec3d7e7e285f3788bf0d1ba4c8605b78@chromium.org>
Commit-Queue: Ting Shen <c671d3efec3d7e7e285f3788bf0d1ba4c8605b78@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec