puff: Remove ANX7447 OCM flash erase support.
puff: Remove ANX7447 OCM flash erase support.

Puff uses the ANX3447 variant of the ANX7447 TCPC.
This part has no support for OCM flash, so there is no
need to have a command to erase this flash.

BRANCH=none
TEST=verified on puff h/w
BUG=b:147113023
Signed-off-by: Andrew McRae <amcrae@google.com>

Change-Id: I1409dea863ee908c5592d576d7c6ffd7def0ad04
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1985723
Tested-by: Andrew McRae <44ad1424cfc8411c96d9181798ca41ae55709dfb@chromium.org>
Reviewed-by: Peter Marheine <ef0b2c492edde94778d7465bfbaeed52c5be6858@chromium.org>
Commit-Queue: Andrew McRae <44ad1424cfc8411c96d9181798ca41ae55709dfb@chromium.org>

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