src/vs/workbench/contrib/timeline/common/timelineService.ts/TimelineService/unregisterTimelineProvider
class TimelineService:	unregisterTimelineProvider(id: string): void {
		this.logService.trace(`TimelineService#unregisterTimelineProvider: id=${id}`);

		if (!this.providers.has(id)) {
			return;
		}

		this.providers.delete(id);
		this.providerSubscriptions.delete(id);

		this.updateHasProviderContext();

		this._onDidChangeProviders.fire({ removed: [id] });
	}