Harald Alvestrand 20f9401578 Remove GTEST_ALLOW_UNINSTANTIATED in datachannel tests
The tests are now all gated behind a singe WEBRTC_HAVE_SCTP flag,
including the invocations, so the issue of configs that vary which
tests are included should have gone away.

This CL also clears out the remains of
DataChannelIntegrationTestWithFakeClock, which is no longer used.

Bug: webrtc:12525
Change-Id: Ie0133e3e84358e9238b8e7465200f000519b8765
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/219783
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Florent Castelli <orphis@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34085}
2021-05-21 20:50:48 +00:00
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