As of CL 271646, all external callers have been eliminated. Replace
the remaining internal caller with a direct reference to the buildList
variable and remove the exported function to prevent backsliding.
For #36460
Change-Id: Iea82df1e3e604ada602dda3e830c06d441eee2a7
Reviewed-on: https://go-review.googlesource.com/c/go/+/271647
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com> Reviewed-by: Jay Conrod <jayconrod@google.com>