Application Insights Classic

Note that App Insights Classic are no longer supported:
https://www.npmjs.com/package/@vscode/extension-telemetry

This appears to be the correct initialization procedure, not sure how it
got disabled.

Signed-off-by: Kingdon Barrett <kingdon@weave.works>

src/data/telemetry.ts

@@ -40,6 +40,7 @@ export class Telemetry {
 		this.context = context;
 		const key = '9a491deb-120a-4a6e-8893-f528d4f6bd9c';
 		this.reporter = new TelemetryReporter(extensionId, extensionVersion, key);
+		context.subscriptions.push(this.reporter);
 	}
 
 	/**