[iOS] Delete ios/chrome/browser/ui target

This CL removes the target.

Bug: 944008
Change-Id: Ie2239d585e6da86d444595839f00aaa8c2f692b4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1578545
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653181}
4 files changed