[iOS] Remove unused parameter from ShowPlusAddressesBottomSheet

Change-Id: I54d7f8b6efd9cda5f018f1f453b83529fb515f5a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5425055


Commit-Queue: Tommy Martino <tmartino@chromium.org>
Reviewed-by: Tommy Martino <tmartino@chromium.org>
Auto-Submit: Vidhan Jain <vidhanj@google.com>
Cr-Commit-Position: refs/heads/main@{#1282583}