crosh/crosh: Remove dependency on salsa

BUG=chromium:351796
TEST=manually tested buildbot image

Change-Id: I6e076a05451acb26cc756edf4f7f9348d1a9bb69
Reviewed-on: https://chromium-review.googlesource.com/189673
Reviewed-by: Andrew de los Reyes <adlr@chromium.org>
Commit-Queue: Andrew de los Reyes <adlr@chromium.org>
Tested-by: Andrew de los Reyes <adlr@chromium.org>
1 file changed