diff --git a/ci/dev/README.md b/ci/dev/README.md
index 8c0f473f376e3..fe2a07712bd60 100644
--- a/ci/dev/README.md
+++ b/ci/dev/README.md
@@ -2,7 +2,7 @@ This directory contains resources that the Flutter team uses during
 the development of engine.
 
 ## Luci builder file
-`engine_try_builders.json` and `engine_prod_builders.json` contains the 
+`try_builders.json` and `prod_builders.json` contains the 
 supported luci try/prod builders for engine. It follows format:
 ```json
 {
@@ -21,8 +21,3 @@ supported luci try/prod builders for engine. It follows format:
 This file will be mainly used in [`flutter/cocoon`](https://github.com/flutter/cocoon)
 to trigger/update engine luci tasks.
 
-If any new changes, please validate json contents by running
-```
-dart validate_json.dart engine_try_builders.json
-dart validate_json.dart engine_prod_builders.json
-```
diff --git a/ci/dev/dev_test.sh b/ci/dev/dev_test.sh
deleted file mode 100644
index 43d4880bce736..0000000000000
--- a/ci/dev/dev_test.sh
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/bin/bash
-# Copyright 2020 The Flutter Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# Runner for dart tests. It expects a single parameter with the full
-# path to the start folder where tests will be run.
-
-set -e
-
-dir=$(dirname $0)
-
-pushd $dir > /dev/null
-dart validate_json.dart engine_try_builders.json
-dart validate_json.dart engine_prod_builders.json
-
-popd > /dev/null
-
-
diff --git a/ci/dev/engine_prod_builders.json b/ci/dev/prod_builders.json
similarity index 100%
rename from ci/dev/engine_prod_builders.json
rename to ci/dev/prod_builders.json
diff --git a/ci/dev/engine_try_builders.json b/ci/dev/try_builders.json
similarity index 100%
rename from ci/dev/engine_try_builders.json
rename to ci/dev/try_builders.json
diff --git a/ci/dev/validate_json.dart b/ci/dev/validate_json.dart
deleted file mode 100644
index 957813cf4d3eb..0000000000000
--- a/ci/dev/validate_json.dart
+++ /dev/null
@@ -1,76 +0,0 @@
-// Copyright 2020 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'dart:convert';
-import 'dart:io';
-import 'dart:io' show File;
-import 'dart:io' as io_internals show exit;
-
-final bool hasColor = stdout.supportsAnsiEscapes;
-final String bold = hasColor ? '\x1B[1m' : ''; // used for shard titles
-final String red = hasColor ? '\x1B[31m' : ''; // used for errors
-final String reset = hasColor ? '\x1B[0m' : '';
-final String reverse = hasColor ? '\x1B[7m' : ''; // used for clocks
-
-/// Validates if the input builders JSON file has valid contents.
-///
-/// Examples:
-/// dart validate_json.dart /path/to/json/file
-Future<void> main(List<String> args) async {
-  final String jsonString = await File(args[0]).readAsString();
-  Map<String, dynamic> decodedJson;
-  final List<String> messages = <String>[];
-  try {
-    decodedJson = json.decode(jsonString) as Map<String, dynamic>;
-    final List<dynamic> builders = decodedJson['builders'] as List<dynamic>;
-    if (builders == null) {
-      messages.add('${bold}Json format is violated: no "builders" exists. Please follow: $reset');
-      messages.add('''
-      {
-        "builders":[
-          {
-            "name":"xxx",
-            "repo":"engine"
-          }, {
-            "name":"xxx",
-            "repo":"engine"
-          }
-        ]
-      }''');
-      exitWithError(messages);
-    }
-  } on ExitException catch (error) {
-    error.apply();
-  }
-  print('$clock ${bold}Analysis successful for ${args[0]}.$reset');
-}
-
-class ExitException implements Exception {
-  ExitException(this.exitCode);
-
-  final int exitCode;
-
-  void apply() {
-    io_internals.exit(exitCode);
-  }
-}
-
-void exitWithError(List<String> messages) {
-  final String redLine = '$red━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━$reset';
-  print(redLine);
-  messages.forEach(print);
-  print(redLine);
-  exit(1);
-}
-
-String get clock {
-  final DateTime now = DateTime.now();
-  return '$reverse▌'
-      '${now.hour.toString().padLeft(2, "0")}:'
-      '${now.minute.toString().padLeft(2, "0")}:'
-      '${now.second.toString().padLeft(2, "0")}'
-      '▐$reset';
-}
-
-