Artem Titov f37e9a385e Revert "Add rtc::Thread invoke policy."
This reverts commit 26d4f9cd398fa4d98408daccd54246c9af59a624.

Reason for revert: Breaks downstream project

Original change's description:
> Add rtc::Thread invoke policy.
> 
> Policy will allow explicitly specify thread between which invokes are
> allowed, or explicitly forbid any invokes.
> 
> Change-Id: I360e7cba3ce1c21abd5047c6f175d8c4e0e99c6f
> Bug: webrtc:11728
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/177526
> Reviewed-by: Tommi <tommi@webrtc.org>
> Commit-Queue: Artem Titov <titovartem@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#31604}

TBR=tommi@webrtc.org,titovartem@webrtc.org

Change-Id: If49596831d532ed97ac80416a2358c0fc4567758
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:11728
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/178561
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31611}
2020-07-02 10:17:13 +00:00
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