Delete platform-specific specs from configv1

[Warashi]

What this PR does:

as title

Why we need it:

We move platform-specific config to plugins, so we don't want these at the configv1 package. I copied them on #5237, but I realized it was not a good way to copy all of them, so I removed some parts on this PR.

Which issue(s) this PR fixes:

Part of #4980

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 25.16%. Comparing base (ad3c877) to head (58c922b). Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #5300 +/- ## ========================================== + Coverage 25.14% 25.16% +0.01% ========================================== Files 449 444 -5 Lines 47642 47504 -138 ========================================== - Hits 11980 11954 -26 + Misses 34717 34606 -111 + Partials 945 944 -1 ```

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