Remove web::WaitUntilWindowIdInjected test util.

WindowID is no longer injected so there is no need to wait for it.

Bug: 905939
Change-Id: Id1896eeb4a2e00f2f79e7f713443cbc80ac95b33
Reviewed-on: https://chromium-review.googlesource.com/c/1377339
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Mike Dougherty <michaeldo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616758}
5 files changed