include/mosys/platform: remove nvram callbacks

Nothing defines or uses these anymore.

BUG=chromium:990438
TEST=compiles

Change-Id: I1293975aaf8f8cc0e997435ddcb6101f31613ee8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/mosys/+/2469468
Tested-by: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Jack Rosenthal <jrosenth@chromium.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
1 file changed