diff --git a/tools/protobuf/protoc_gen_dart/BUILD.gn b/tools/protobuf/protoc_gen_dart/BUILD.gn
deleted file mode 100644
index a3f5371..0000000
--- a/tools/protobuf/protoc_gen_dart/BUILD.gn
+++ /dev/null
@@ -1,14 +0,0 @@
-# Copyright 2018 The Fuchsia 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("//build/dart/dart_tool.gni")
-
-# This is the protobuf plugin for dart we supply to the protoc compiler.
-dart_tool("protoc_gen_dart") {
-  package_name = "protoc_gen_dart"
-
-  main_dart = "lib/main.dart"
-
-  deps = [ "//third_party/dart-pkg/pub/protoc_plugin" ]
-}
diff --git a/tools/protobuf/protoc_gen_dart/analysis_options.yaml b/tools/protobuf/protoc_gen_dart/analysis_options.yaml
deleted file mode 100644
index 48e8ec9..0000000
--- a/tools/protobuf/protoc_gen_dart/analysis_options.yaml
+++ /dev/null
@@ -1,5 +0,0 @@
-# Copyright 2018 The Fuchsia Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-include: ../../analysis_options.yaml
diff --git a/tools/protobuf/protoc_gen_dart/lib/main.dart b/tools/protobuf/protoc_gen_dart/lib/main.dart
deleted file mode 100644
index 34b1638..0000000
--- a/tools/protobuf/protoc_gen_dart/lib/main.dart
+++ /dev/null
@@ -1,93 +0,0 @@
-// Copyright 2018 The Fuchsia 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:io';
-
-import 'package:path/path.dart' as path;
-import 'package:protoc_plugin/protoc.dart';
-
-/// This is the alternate plugin driver for dart protobuf bindings. This
-/// plugin driver is suppled into the `protoc` (or protoc_wrapper.py). This
-/// driver is used alongside GN, takes in a mapping of dart package name -> dart
-/// package paths, and uses these mappings to transform strictly file-based
-/// imports to package-based imports.
-///
-/// The plugin option passed to `protoc` end up here. The option format is:
-/// A semicolon-separated list of package name -> package directory mappings of
-/// the form `package_name|input_root`. `input_root` designates the directory
-/// relative to which input protos are located -- typically the root of the GN
-/// package, where the `BUILD.gn` file is located.
-///
-/// The options above are used in the following way:
-/// * Given a file-based import path in the .proto file, the generated dart
-///   import path is rebased to a package path if possible.
-/// * See [DartImportMappingOutputConfiguration.resolveImport] below.
-class DartImportMappingOptionParser extends SingleOptionParser {
-  /// This is the option key we pass to protoc;
-  static const String kImportOptionKey = 'PackagePaths';
-
-  /// Output map of: package input root => package name
-  final Map<String, String> packageMapping;
-
-  DartImportMappingOptionParser(this.packageMapping);
-
-  @override
-  void parse(String name, String value, onError(String message)) {
-    if (value == null) {
-      onError('Invalid $kImportOptionKey option. Expected a non-empty value.');
-      return;
-    }
-
-    for (var entry in value.split(';')) {
-      var fields = entry.split('|');
-      if (fields.length != 2) {
-        onError('ERROR: expected package_name|input_root. Got: $entry');
-        continue;
-      }
-      if (packageMapping.containsKey(fields[1])) {
-        onError('ERROR: ${fields[1]} already exists.');
-        continue;
-      }
-      packageMapping[fields[1]] = fields[0];
-    }
-  }
-}
-
-class DartImportMappingOutputConfiguration extends DefaultOutputConfiguration {
-  /// Output map (package root) => package name
-  final Map<String, String> packageMapping;
-
-  DartImportMappingOutputConfiguration(this.packageMapping);
-
-  /// Given a file-based import path ("a/b/c/d.proto"), this routine looks
-  /// through the [packageMapping] to find a package that this import may fall
-  /// under.  If it can find one, it rebases the import path to the package
-  /// input root in the generated import string.
-  @override
-  Uri resolveImport(Uri target, Uri source, String extension) {
-    for (int i = target.pathSegments.length; i > 0; i--) {
-      var candidatePath = target.pathSegments.sublist(0, i).join('/');
-      if (packageMapping.containsKey(candidatePath)) {
-        var packageName = packageMapping[candidatePath];
-        var importPath = target.pathSegments
-            .sublist(i, target.pathSegments.length)
-            .join('/');
-        var genImportPath = '${path.withoutExtension(importPath)}.pb.dart';
-        return Uri.parse('package:$packageName/$genImportPath');
-      }
-    }
-    return super.resolveImport(target, source, extension);
-  }
-}
-
-void main() {
-  var packageMapping = <String, String>{};
-  CodeGenerator(stdin, stdout).generate(
-    optionParsers: {
-      DartImportMappingOptionParser.kImportOptionKey:
-          DartImportMappingOptionParser(packageMapping),
-    },
-    config: DartImportMappingOutputConfiguration(packageMapping),
-  );
-}
diff --git a/tools/protobuf/protoc_gen_dart/pubspec.yaml b/tools/protobuf/protoc_gen_dart/pubspec.yaml
deleted file mode 100644
index e69de29..0000000
--- a/tools/protobuf/protoc_gen_dart/pubspec.yaml
+++ /dev/null