Remove unused record and replay functionality.

tools/testing/dart/configuration.dart

 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
 import 'compiler_configuration.dart';
 import 'http_server.dart';
@@ skipping 40 matching lines @@
       this.writeDebugLog,
       this.writeTestOutcomeLog,
       this.drtPath,
       this.dartiumPath,
       this.chromePath,
       this.safariPath,
       this.firefoxPath,
       this.dartPath,
       this.dartPrecompiledPath,
       this.flutterPath,
-      this.recordingPath,
-      this.replayPath,
       this.taskCount,
       int timeout,
       this.shardCount,
       this.shard,
       this.stepName,
       this.testServerPort,
       this.testServerCrossOriginPort,
       this.testDriverErrorPort,
       this.localIP,
       this.dart2jsOptions,
@@ skipping 45 matching lines @@
   // Various file paths.
 
   final String drtPath;
   final String dartiumPath;
   final String chromePath;
   final String safariPath;
   final String firefoxPath;
   final String dartPath;
   final String dartPrecompiledPath;
   final String flutterPath;
-  final String recordingPath;
-  final String replayPath;
 
   final int taskCount;
   final int shardCount;
   final int shard;
   final String stepName;
 
   final int testServerPort;
   final int testServerCrossOriginPort;
   final int testDriverErrorPort;
   final String localIP;
@@ skipping 592 matching lines @@
 
       case macos:
         return 'xcodebuild/';
     }
 
     throw "unreachable";
   }
 
   String toString() => "System($name)";
 }