Revert "Add wait for target update after navigation"

This reverts commit 6936eb033ac1369fc2d9f8bb40af8da0f972b81d.

Reason for revert: Causing test failures in Chromium, blocking the roller from Catapult to Chromium.

Failure Link: https://chromium-review.git.corp.google.com/c/chromium/src/+/8006011

Original change's description:
> Add wait for target update after navigation
>
> Test |testGetUpdatedInspectableContextsUpdateContextsData| is flaky: we
> got empty url in |/json| response, but after small time url become not
> empty.
> In some cases |/json| request arrive to main process before arrive
> message |DidCommitNavigation|. So we need wait for message arrive to
> main process after navigation completed
>
> Change-Id: Ibec8b8b4ca9227231386ccc075e16edaec0eb45d
> Reviewed-on: https://chromium-review.googlesource.com/c/catapult/+/8005475
> Auto-Submit: Victor Samun <victorsamun@yandex-team.ru>
> Reviewed-by: John Chen <johnchen@chromium.org>
> Reviewed-by: Farid (Mojtaba) Faridzad <faridzad@google.com>
> Commit-Queue: Farid (Mojtaba) Faridzad <faridzad@google.com>

Change-Id: I67f55487b7c472e4db31cab4147e4ee7ae43021c
Reviewed-on: https://chromium-review.googlesource.com/c/catapult/+/8074864
Reviewed-by: Farid (Mojtaba) Faridzad <faridzad@google.com>
Commit-Queue: John Chen <johnchen@chromium.org>
Auto-Submit: John Chen <johnchen@chromium.org>