This reverts commit e1410883.

Reason for revert: 
This appears to have broken Skia's Presubmit:
https://chromium-swarm.appspot.com/task?id=47d11ff76d07a610

Original change's description:
> depot_tools: Add httplib2 to .vpython
> 
> Check that things won't break before further changes are made.
> 
> Bug: 1002153
> Change-Id: I41866f26334bf9ec2732bc0f25007234a95130e4
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1854749
> Auto-Submit: Edward Lesmes <ehmaldonado@chromium.org>
> Commit-Queue: Andrii Shyshkalov <tandrii@google.com>
> Reviewed-by: Andrii Shyshkalov <tandrii@google.com>

TBR=tandrii@google.com,ehmaldonado@chromium.org,apolito@google.com

Change-Id: Ie73c4172c349ea0c22cad399f4ef948b9486e028
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1002153
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1855590Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>