[iOS][web] Remove unused method for WebUI

This CL removes a method that is now unused to load a WebUI URL.
It was needed before for handling the session restoration URLs.

Bug: 956035
Change-Id: I41ce13c1d216875d0c64d80bf6463be76ca2cd77
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1581632
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Auto-Submit: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653976}
1 file changed