Resolve integration_test/ findings

Author: kenzieschmoll

analysis_options.yaml

@@ -163,7 +163,6 @@ dart_code_metrics:
       # devtools_app/.
       # TODO(https://github.com/flutter/devtools/issues/9906) remove these
       # excludes as findings are resolved.
-      - integration_test/**
       # Investigate internal usages of inspector_controller before removing.
       - lib/src/screens/inspector/**_controller.dart
       - lib/src/service/**

packages/devtools_app/integration_test/test_infra/run/_test_app_driver.dart

@@ -389,11 +389,9 @@ final class FlutterDaemonConstants {
   static const paramsKey = 'params';
   static const traceKey = 'trace';
   static const wsUriKey = 'wsUri';
-  static const pidKey = 'pid';
   static const appStopKey = 'app.stop';
   static const appStartedKey = 'app.started';
   static const appDebugPortKey = 'app.debugPort';
-  static const daemonConnectedKey = 'daemon.connected';
 }
 
 enum TestAppDevice {