platform/x86_64: remove cros_spi_flash_nvram_cb
crossystem has this functionality directly now as of CL:2218890, so we
can remove it from mosys for x86 platforms.
The ARM platforms will need further evaluation at a later point.
BUG=chromium:990438,chromium:1030473
TEST=compiles
Change-Id: If4a8fd2c6dbc1d27af9c01c38faae583577d32b6
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/mosys/+/2241788
Tested-by: Jack Rosenthal <jrosenth@chromium.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Commit-Queue: Jack Rosenthal <jrosenth@chromium.org>
48 files changed
