Revert "[ios] add credit card test for manual fallback"

This reverts commit 30e1dd180408413c8fce6dbe5b856c048a8ca908.

Reason for revert: https://crbug.com/908970

Original change's description:
> [ios] add credit card test for manual fallback
> 
> Also adds AutofillManualFallbackPhaseTwo to test bots.
> 
> Bug: 845472
> Change-Id: I6bd05781c09c24c0768e24acfe59efa7ce1da05d
> Reviewed-on: https://chromium-review.googlesource.com/c/1337347
> Reviewed-by: Rohit Rao <rohitrao@chromium.org>
> Reviewed-by: Ben Pastene <bpastene@chromium.org>
> Reviewed-by: Javier Ernesto Flores Robles <javierrobles@chromium.org>
> Commit-Queue: David Jean <djean@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#611171}

TBR=rohitrao@chromium.org,bpastene@chromium.org,javierrobles@chromium.org,djean@chromium.org

Change-Id: Ied47c5923ca1a71604a04df719bf2a18bae39265
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 845472
Reviewed-on: https://chromium-review.googlesource.com/c/1352513
Reviewed-by: Ken Rockot <rockot@google.com>
Commit-Queue: Ken Rockot <rockot@google.com>
Cr-Commit-Position: refs/heads/master@{#611297}
5 files changed