Revert "Add browser test and testing config for dynamic Expect-CT reporting"

This reverts commit f51e5d491800e1a112f009266589625b1f6a4ab6.

Reason for revert: This test fails on official builds because the field trial testing config doesn't apply. I will explicitly enable the Finch feature in the test and reland.

Original change's description:
> Add browser test and testing config for dynamic Expect-CT reporting
> 
> This CL adds a browser test to check that the ChromeExpectCTReporter is properly
> created and set up to receive reports, particularly for dynamic Expect-CT
> violations. It also enables the dynamic Expect-CT feature on the waterfall.
> 
> BUG=679012,642517
> 
> Change-Id: I3ea01207ea5852b9bd0bbb1d90799ee4555c854e
> Reviewed-on: https://chromium-review.googlesource.com/566572
> Reviewed-by: Jesse Doherty <jwd@chromium.org>
> Reviewed-by: Mustafa Emre Acer <meacer@chromium.org>
> Commit-Queue: Emily Stark <estark@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#486158}

TBR=jwd@chromium.org,meacer@chromium.org,estark@chromium.org

Change-Id: I60d13cfa015707d535e0afb86cf10d74ecb35b79
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 679012, 642517
Reviewed-on: https://chromium-review.googlesource.com/570383
Reviewed-by: Emily Stark <estark@chromium.org>
Commit-Queue: Emily Stark <estark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486415}
3 files changed