Revert "[Gstreamer][Westeros] Bring back westeros autoplug code for playbin3"

This reverts commit eb1c70d.

We do this downstream for wpe-2.38 only because it was requested by a partner.
Westeros sink autoplug will not work unless you have the gst-plugins-base
patches added to your GStreamer build.

Author: calvaris

Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp

@@ -981,6 +981,8 @@ void MediaPlayerPrivateGStreamer::syncOnClock(bool sync)
 #if !USE(WESTEROS_SINK)
     setSyncOnClock(videoSink(), sync);
     setSyncOnClock(audioSink(), sync);
+#else
+    UNUSED_PARAM(sync);
 #endif
 }
 
@@ -2292,40 +2294,12 @@ void MediaPlayerPrivateGStreamer::configureElementPlatformQuirks(GstElement* ele
 #endif
 #endif
 
-#if USE(WESTEROS_SINK)
-    static GstCaps* westerosSinkCaps = nullptr;
-    static GType westerosSinkType = G_TYPE_INVALID;
-    static std::once_flag onceFlag;
-    std::call_once(onceFlag, [] {
-        GRefPtr<GstElementFactory> westerosfactory = adoptGRef(gst_element_factory_find("westerossink"));
-        if (westerosfactory) {
-            gst_object_unref(gst_plugin_feature_load(GST_PLUGIN_FEATURE(westerosfactory.get())));
-            westerosSinkType = gst_element_factory_get_element_type(westerosfactory.get());
-            for (auto* t = gst_element_factory_get_static_pad_templates(westerosfactory.get()); t; t = g_list_next(t)) {
-                GstStaticPadTemplate* padtemplate = static_cast<GstStaticPadTemplate*>(t->data);
-                if (padtemplate->direction != GST_PAD_SINK)
-                    continue;
-                if (westerosSinkCaps)
-                    westerosSinkCaps = gst_caps_merge(westerosSinkCaps, gst_static_caps_get(&padtemplate->static_caps));
-                else
-                    westerosSinkCaps = gst_static_caps_get(&padtemplate->static_caps);
-            }
-        }
-    });
 #if ENABLE(MEDIA_STREAM)
     if (m_streamPrivate && !g_strcmp0(G_OBJECT_TYPE_NAME(G_OBJECT(element)), "GstWesterosSink") && gstObjectHasProperty(element, "immediate-output")) {
         GST_DEBUG_OBJECT(pipeline(), "Enable 'immediate-output' in WesterosSink");
         g_object_set(element, "immediate-output", TRUE, nullptr);
     }
 #endif
-    if (!m_isLegacyPlaybin && westerosSinkCaps && g_str_has_prefix(GST_ELEMENT_NAME(element), "uridecodebin3")) {
-        GRefPtr<GstCaps> defaultCaps;
-        g_object_get(element, "caps", &defaultCaps.outPtr(), NULL);
-        defaultCaps = adoptGRef(gst_caps_merge(gst_caps_ref(westerosSinkCaps), defaultCaps.leakRef()));
-        g_object_set(element, "caps", defaultCaps.get(), NULL);
-        GST_INFO_OBJECT(pipeline(), "setting stop caps tp %" GST_PTR_FORMAT, defaultCaps.get());
-    }
-#endif
 
 #if ENABLE(MEDIA_STREAM) && PLATFORM(REALTEK)
     if (m_streamPrivate) {