Bug 1714303 - Remove the probe about chained ogg. r=bryce

Differential Revision: https://phabricator.services.mozilla.com/D116698

dom/media/ogg/OggDemuxer.cpp

@@ -171,24 +171,6 @@ OggDemuxer::~OggDemuxer() {
   MOZ_COUNT_DTOR(OggDemuxer);
   Reset(TrackInfo::kAudioTrack);
   Reset(TrackInfo::kVideoTrack);
-  if (HasAudio() || HasVideo()) {
-    // If we were able to initialize our decoders, report whether we encountered
-    // a chained stream or not.
-    bool isChained = mIsChained;
-    void* ptr = this;
-    nsCOMPtr<nsIRunnable> task = NS_NewRunnableFunction(
-        "OggDemuxer::~OggDemuxer", [ptr, isChained]() -> void {
-          // We can't use OGG_DEBUG here because it implicitly refers to `this`,
-          // which we can't capture in this runnable.
-          MOZ_LOG(gMediaDemuxerLog, mozilla::LogLevel::Debug,
-                  ("OggDemuxer(%p)::%s: Reporting telemetry "
-                   "MEDIA_OGG_LOADED_IS_CHAINED=%d",
-                   ptr, __func__, isChained));
-          Telemetry::Accumulate(
-              Telemetry::HistogramID::MEDIA_OGG_LOADED_IS_CHAINED, isChained);
-        });
-    SchedulerGroup::Dispatch(TaskCategory::Other, task.forget());
-  }
 }
 
 void OggDemuxer::SetChainingEvents(TimedMetadataEventProducer* aMetadataEvent,

toolkit/components/telemetry/Histograms.json

@@ -10374,15 +10374,6 @@
     "n_buckets": 100,
     "description": "The time (in milliseconds) that it took to load a source for the user."
   },
-  "MEDIA_OGG_LOADED_IS_CHAINED": {
-    "record_in_processes": ["main", "content"],
-    "products": ["firefox", "fennec"],
-    "alert_emails": ["jya@mozilla.com", "drno@ohlmeier.org"],
-    "expires_in_version": "70",
-    "kind": "boolean",
-    "description": "Whether while playing Ogg audio/video we encountered a chained Ogg. Reported on every audio or video element that loads an Ogg file.",
-    "bug_numbers": [1230295]
-  },
   "MEDIA_MKV_CANPLAY_REQUESTED": {
     "record_in_processes": ["content"],
     "products": ["firefox"],