style(extend-app-start): Drop redundant extend-listener comment

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: buenaflor

sentry-android-core/src/main/java/io/sentry/android/core/ActivityLifecycleIntegration.java

@@ -143,7 +143,6 @@ public void register(final @NotNull IScopes scopes, final @NotNull SentryOptions
     if (performanceEnabled && this.options.isEnableStandaloneAppStartTracing()) {
       final @NotNull AppStartMetrics metrics = AppStartMetrics.getInstance();
       metrics.setHeadlessAppStartListener(this::onHeadlessAppStart);
-      // Enables Sentry.extendAppStart(). Standalone-only, since it is only registered here.
       metrics.getAppStartExtension().setExtendAppStartListener(this::onExtendAppStartRequested);
       addIntegrationToSdkVersion("StandaloneAppStart");
     }