Remove unnecessary comment and import (flutter#8552)

I thought the flutter log wasn't working with the sandbox, but the problem was my own filtering. 
<img width="573" height="192" alt="Screenshot 2025-09-25 at 9 56 06 AM" src="https://github.com/user-attachments/assets/330cdfbe-60d5-4203-a00b-a133acbd3f6a" />

Author: helin24

.idea/runConfigurations/flutter_intellij__runIde_.xml

@@ -19,7 +19,6 @@
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.util.Key;
 import io.flutter.logging.PluginLogger;
-import io.flutter.settings.FlutterSettings;
 import io.flutter.utils.JsonUtils;
 import io.flutter.utils.StdoutJsonParser;
 import org.jetbrains.annotations.NotNull;