fix: remove unnecessary console.log statement (#8437)

Author: TheeKia

.changeset/perfect-weeks-care.md

@@ -0,0 +1,5 @@
+---
+'@firebase/app': patch
+---
+
+Removed an unnecessary console.log statement.

packages/app/src/heartbeatService.ts

@@ -90,7 +90,6 @@ export class HeartbeatServiceImpl implements HeartbeatService {
       // service, not the browser user agent.
       const agent = platformLogger.getPlatformInfoString();
       const date = getUTCDateString();
-      console.log('heartbeats', this._heartbeatsCache?.heartbeats);
       if (this._heartbeatsCache?.heartbeats == null) {
         this._heartbeatsCache = await this._heartbeatsCachePromise;
         // If we failed to construct a heartbeats cache, then return immediately.