Revert of Add recently removed iOS CQ unit tests back to FYI. (patchset #2 id:20001 of https://codereview.chromium.org/2922253004/ )

Reason for revert:
Now that ios_chrome_unittests are back in common_tests.json, fyi bots have an exception for two instances of ios_chrome_unittests. Same with net_unittests.

Original issue's description:
> Add recently removed iOS CQ unit tests back to FYI.
>
> Create new fyi_tests.json so we can more easily run different
> suites on multiple fyi configurations.
>
> BUG=728216
>
> Review-Url: https://codereview.chromium.org/2922253004
> Cr-Commit-Position: refs/heads/master@{#477528}
> Committed: https://chromium.googlesource.com/chromium/src/+/77dac22383dca465e09cfbbb61fadfce83c9eede

TBR=rohitrao@chromium.org,smut@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=728216

Review-Url: https://codereview.chromium.org/2924163004
Cr-Commit-Position: refs/heads/master@{#477888}
2 files changed