Remove WebRTC RTCMediaStreamTrackStats

https://bugs.webkit.org/show_bug.cgi?id=256690
rdar://109251896

Reviewed by Eric Carlson.

Remove RTCMediaStreamTrackStats since all stats are now in other stat dictionaries.
It is also removed from the spec.

* LayoutTests/imported/w3c/web-platform-tests/webrtc/RTCPeerConnection-mandatory-getStats.https-expected.txt:
* LayoutTests/imported/w3c/web-platform-tests/webrtc/RTCPeerConnection-track-stats.https-expected.txt: Removed.
* LayoutTests/imported/w3c/web-platform-tests/webrtc/RTCPeerConnection-track-stats.https.html: Removed.
* LayoutTests/platform/glib/TestExpectations:
* LayoutTests/platform/mac-wk2/TestExpectations:
* LayoutTests/webrtc/video-mediastreamtrack-stats-expected.txt: Removed.
* LayoutTests/webrtc/video-mediastreamtrack-stats.html: Removed.
* LayoutTests/webrtc/video-stats.html:
* Source/WebCore/Modules/mediastream/RTCStatsReport.h:
(WebCore::RTCStatsReport::MediaStreamTrackStats::MediaStreamTrackStats): Deleted.
* Source/WebCore/Modules/mediastream/RTCStatsReport.idl:
* Source/WebCore/Modules/mediastream/libwebrtc/LibWebRTCStatsCollector.cpp:
(WebCore::fillInboundRtpStreamStats):
(WebCore::fillOutboundRtpStreamStats):
(WebCore::initializeRTCStatsReportBackingMap):
(WebCore::fillRTCMediaStreamTrackStats): Deleted.

Canonical link: https://commits.webkit.org/264014@main

Author: youennf

LayoutTests/imported/w3c/web-platform-tests/webrtc/RTCPeerConnection-mandatory-getStats.https-expected.txt

@@ -11,7 +11,7 @@ PASS RTCReceivedRtpStreamStats's jitter
 PASS RTCReceivedRtpStreamStats's packetsDiscarded
 PASS RTCReceivedRtpStreamStats's framesDropped
 FAIL RTCInboundRtpStreamStats's receiverId assert_true: Is receiverId present expected true got false
-FAIL RTCInboundRtpStreamStats's remoteId assert_true: Is remoteId present expected true got false
+PASS RTCInboundRtpStreamStats's remoteId
 PASS RTCInboundRtpStreamStats's framesDecoded
 PASS RTCInboundRtpStreamStats's nackCount
 PASS RTCInboundRtpStreamStats's framesReceived