platform: remove unused eeprom setup functions

None of these are used.

BUG=chromium:990438
TEST=compiles

Change-Id: I52514943a631889f9e9225b48b8ac979d0eeb490
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/mosys/+/2204957
Tested-by: Jack Rosenthal <jrosenth@chromium.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Victor Ding <victording@chromium.org>
Commit-Queue: Jack Rosenthal <jrosenth@chromium.org>
7 files changed