Revert "Restores surface size in the postTest of test binding (#87240)" (#87258)

This reverts commit 7707f423.

packages/flutter_test/lib/src/binding.dart

@@ -889,11 +889,6 @@ abstract class TestWidgetsFlutterBinding extends BindingBase
     _parentZone = null;
     buildOwner!.focusManager.dispose();
     buildOwner!.focusManager = FocusManager()..registerGlobalHandlers();
-    // Reset surface size. The renderview configuration is tied with it and
-    // needs to be recreated. Don't use [handleMetricsChanged] because it
-    // introduces unwanted side effects.
-    _surfaceSize = null;
-    renderView.configuration = createViewConfiguration();
     // Disabling the warning because @visibleForTesting doesn't take the testing
     // framework itself into account, but we don't want it visible outside of
     // tests.