Revert "Test oobe screens for public session login"

This reverts commit 144e9e93d5e1007ed3bc6443e7afc3d4e353e094.

Reason for revert: suspect causing PublicSessionWithTermsOfServiceOobeTestImpl timeout on Linux ChromiumOS MSan Tests

https://ci.chromium.org/p/chromium/builders/ci/Linux%20ChromiumOS%20MSan%20Tests/12947
browser_tests deterministic failures:
PublicSessionWithTermsOfServiceOobeTestImpl/PublicSessionWithTermsOfServiceOobeTest.AcceptTermsOfService/0
PublicSessionWithTermsOfServiceOobeTestImpl/PublicSessionWithTermsOfServiceOobeTest.AcceptTermsOfService/1
PublicSessionWithTermsOfServiceOobeTestImpl/PublicSessionWithTermsOfServiceOobeTest.AcceptTermsOfService/2
PublicSessionWithTermsOfServiceOobeTestImpl/PublicSessionWithTermsOfServiceOobeTest.AcceptTermsOfService/5
PublicSessionWithTermsOfServiceOobeTestImpl/PublicSessionWithTermsOfServiceOobeTest.AcceptTermsOfService/6
PublicSessionWithTermsOfServiceOobeTestImpl/PublicSessionWithTermsOfServiceOobeTest.AcceptTermsOfService/7

Original change's description:
> Test oobe screens for public session login
> 
> Tests that the terms of service screen (if required by policy) is the
> only screen shown to public session user during login.
> 
> To make environment setup for different configurations eaiser, separate
> end to end test setup steps from OobeInteractiveUiTest into a separate
> mixin.
> 
> BUG=none
> 
> Change-Id: Ib6580e2b4f63f59c7b262fb0f79982197251724c
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1607103
> Reviewed-by: Alexander Alekseev <alemate@chromium.org>
> Commit-Queue: Toni Baržić <tbarzic@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#660269}

TBR=tbarzic@chromium.org,alemate@chromium.org

Change-Id: Iaa5b1073e336935452a184eeb67a4808fb9626fa
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: none
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1614005
Reviewed-by: Takashi Sakamoto <tasak@google.com>
Commit-Queue: Takashi Sakamoto <tasak@google.com>
Cr-Commit-Position: refs/heads/master@{#660328}
3 files changed