Remove log statements that did not help. (#51825)

Introduced in #51789, but none of the crashes/hangs on CI seem related to these events, so removing.

Author: matanlurey

testing/scenario_app/android/app/src/main/java/dev/flutter/scenarios/ExternalTextureFlutterActivity.java

@@ -91,8 +91,6 @@ public void waitUntilFlutterRendered() {
     super.waitUntilFlutterRendered();
 
     try {
-      // TODO: Remove after debugging https://github.com/flutter/flutter/issues/145988.
-      io.flutter.Log.i("Scenarios", "waitUntilFlutterRendered() | firstFrameLatch");
       firstFrameLatch.await();
     } catch (InterruptedException e) {
       throw new RuntimeException(e);

testing/scenario_app/android/app/src/main/java/dev/flutter/scenarios/TestableFlutterActivity.java

@@ -8,7 +8,6 @@
 import android.view.WindowManager;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import io.flutter.Log;
 import io.flutter.embedding.android.FlutterActivity;
 import io.flutter.embedding.engine.FlutterEngine;
 import java.util.concurrent.CountDownLatch;
@@ -45,8 +44,6 @@ protected void notifyFlutterRendered() {
 
   public void waitUntilFlutterRendered() {
     try {
-      // TODO: Remove after debugging https://github.com/flutter/flutter/issues/145988.
-      Log.i("Scenarios", "waitUntilFlutterRendered() | flutterUiRenderedLatch");
       flutterUiRenderedLatch.await();
     } catch (InterruptedException e) {
       throw new RuntimeException(e);

testing/scenario_app/lib/main.dart

@@ -60,16 +60,10 @@ void _onBeginFrame(Duration duration) {
     return;
   }
   currentScenario!.onBeginFrame(duration);
-
-  // TODO(team): Remove after debugging https://github.com/flutter/flutter/issues/145988.
-  print('onBeginFrame: $duration');
 }
 
 void _onDrawFrame() {
   currentScenario?.onDrawFrame();
-
-  // TODO(team): Remove after debugging https://github.com/flutter/flutter/issues/145988.
-  print('onDrawFrame');
 }
 
 void _onMetricsChanged() {