Delete branch_util and internal/

BUG=chromium:1185285
TEST=none

Change-Id: If12f6cf855b40b5493c3e0a3b9c275118df0b831
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/go/+/2774547
Reviewed-by: George Engelbrecht <engeg@google.com>
Commit-Queue: Jack Neus <jackneus@google.com>
Tested-by: Jack Neus <jackneus@google.com>
63 files changed