[iOS] Remove legacy omnibox classes.

Removes pre-HL popup classes.

Bug: 943521
Change-Id: Ife98510b8d0142df487d7aef0fab08494ab2cdf0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2007569
Commit-Queue: Stepan Khapugin <[email protected]>
Reviewed-by: Robbie Gibson <[email protected]>
Cr-Commit-Position: refs/heads/master@{#733956}
11 files changed