This reverts commit 57ae8330.

Reason: Decision to back out current alias implementation.

For #16339.

Change-Id: I7bcc04ac87ea3590999e58ff65a7f2e1e6c6bc77
Reviewed-on: https://go-review.googlesource.com/32823Reviewed-by: Matthew Dempsky <mdempsky@google.com>