Strip the rest of the repo down

Only these two files are needed left:
- firmware_builder.py
- import-sdk.py

May find a new home for them in the coming weeks but obviously much
less important to move as they change infrequently.

Left the OWNERS file just in case.

BUG=b:177003034
TEST=CQ

Change-Id: I8843057fbab803e0364871a91daff499e10bfcdf
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/zephyr-chrome/+/2634349
Tested-by: Jack Rosenthal <jrosenth@chromium.org>
Auto-Submit: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
17 files changed
tree: b52652d3efae466695866c34fb7a88e6cdfc626e
  1. OWNERS
  2. firmware_builder.py
  3. import-sdk.py