This reverts commit 38d36a61.

Reason for revert: breaks git cl archive for old rietveld branches.

Original change's description:
> git cl: delete no longer used Rietveld methods.
> 
> R=​ehmaldonado
> 
> Bug: 770408
> Change-Id: I4dc034839180a7587ee368793547c5b74c2572f6
> Reviewed-on: https://chromium-review.googlesource.com/c/1279139
> Commit-Queue: Andrii Shyshkalov <tandrii@chromium.org>
> Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>

TBR=tandrii@chromium.org,ehmaldonado@chromium.org

Change-Id: Ifff7b5e13b104841ecf2c190b043ad23f9dbcccd
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 770408
Reviewed-on: https://chromium-review.googlesource.com/c/1284990Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Andrii Shyshkalov <tandrii@chromium.org>