[WebRTC] Remove obsolete emulateRTCPeerConnectionPlatformEvent

[philn]

8e56989

[WebRTC] Remove obsolete emulateRTCPeerConnectionPlatformEvent
https://bugs.webkit.org/show_bug.cgi?id=304638

Reviewed by Adrian Perez de Castro.

That was needed in OpenWebRTC times and was left un-implemented when libwebrtc was added.

* LayoutTests/fast/mediastream/RTCPeerConnection-icecandidate-event.html:
* LayoutTests/fast/mediastream/RTCPeerConnection-iceconnectionstatechange-event.html:
* LayoutTests/fast/mediastream/RTCPeerConnection-remotely-assigned-transceiver-mid.html:
* Source/WebCore/Modules/mediastream/PeerConnectionBackend.h:
* Source/WebCore/Modules/mediastream/RTCPeerConnection.cpp:
(WebCore::RTCPeerConnection::emulatePlatformEvent): Deleted.
* Source/WebCore/Modules/mediastream/RTCPeerConnection.h:
* Source/WebCore/Modules/mediastream/gstreamer/GStreamerPeerConnectionBackend.h:
* Source/WebCore/Modules/mediastream/libwebrtc/LibWebRTCPeerConnectionBackend.h:
* Source/WebCore/testing/Internals.cpp:
(WebCore::Internals::emulateRTCPeerConnectionPlatformEvent): Deleted.
* Source/WebCore/testing/Internals.idl:

Canonical link: https://commits.webkit.org/304896@main

a82af4f

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	🧪 win-tests
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe
	✅ 🧪 ios-wk2-wpt	✅ 🧪 api-mac-debug	✅ 🛠 wpe-cairo-libwebrtc
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
	✅ 🛠 vision	✅ 🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
✅ 🛠 🧪 merge	✅ 🧪 vision-wk2	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🛠 tv	❌ 🧪 mac-intel-wk2
	✅ 🛠 tv-sim	✅ 🛠 mac-safer-cpp
	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on current version of this PR (hash a82af4f)

Details

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	🧪 win-tests
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe
	✅ 🧪 ios-wk2-wpt	✅ 🧪 api-mac-debug	✅ 🛠 wpe-cairo-libwebrtc
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
	✅ 🛠 vision	✅ 🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
✅ 🛠 🧪 merge	✅ 🧪 vision-wk2	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🛠 tv	❌ 🧪 mac-intel-wk2
	✅ 🛠 tv-sim	✅ 🛠 mac-safer-cpp
	✅ 🛠 watch
	✅ 🛠 watch-sim

[aperezdc]

Code deletion, yay!

[webkit-commit-queue]

Committed 304896@main (8e56989): https://commits.webkit.org/304896@main

Reviewed commits have been landed. Closing PR #55826 and removing active labels.