pre-upload: drop u-boot tab check

BUG=chromium:466264
TEST=None

Change-Id: I98b98c670b4ae9dd631f8b3f4c72bb55706de005
Reviewed-on: https://chromium-review.googlesource.com/744701
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed