Revert "Add material icons golden test (#73361)" (#73521)

This reverts commit d3a2db22.

packages/flutter/test/material/icons_test.dart

@@ -2,13 +2,8 @@
 // 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:flutter/material.dart';
-import 'package:flutter/services.dart';
-
 import 'package:flutter_test/flutter_test.dart';
-import 'package:path/path.dart' as path;
 
 void main() {
   testWidgets('IconData object test', (WidgetTester tester) async {
@@ -34,7 +29,8 @@ void main() {
     expect(Icons.access_time_sharp.matchTextDirection, false);
   });
 
-  testWidgets('Adaptive icons are correct on cupertino platforms', (WidgetTester tester) async {
+  testWidgets('Adaptive icons are correct on cupertino platforms',
+        (WidgetTester tester) async {
       expect(Icons.adaptive.arrow_back, Icons.arrow_back_ios);
       expect(Icons.adaptive.arrow_back_outlined, Icons.arrow_back_ios_outlined);
     },
@@ -44,7 +40,9 @@ void main() {
     }),
   );
 
-  testWidgets('Adaptive icons are correct on non-cupertino platforms', (WidgetTester tester) async {
+  testWidgets(
+    'Adaptive icons are correct on non-cupertino platforms',
+        (WidgetTester tester) async {
       expect(Icons.adaptive.arrow_back, Icons.arrow_back);
       expect(Icons.adaptive.arrow_back_outlined, Icons.arrow_back_outlined);
     },
@@ -55,48 +53,4 @@ void main() {
       TargetPlatform.linux,
     }),
   );
-
-  testWidgets('A sample of icons look as expected', (WidgetTester tester) async {
-    await _loadIconFont();
-
-    await tester.pumpWidget(MaterialApp(
-      home: IconTheme(
-        data: const IconThemeData(size: 200),
-        child: Wrap(
-          children: const <Icon>[
-            Icon(Icons.ten_k),
-            Icon(Icons.ac_unit),
-            Icon(Icons.local_taxi),
-            Icon(Icons.local_taxi_outlined),
-            Icon(Icons.local_taxi_rounded),
-            Icon(Icons.local_taxi_sharp),
-            Icon(Icons.zoom_out_sharp),
-          ],
-        ),
-      ),
-    ));
-
-    await expectLater(find.byType(Wrap), matchesGoldenFile('test.icons.sample.png'));
-  }, skip: isBrowser); // uses dart:io
-}
-
-// Loads the Material icon font. Only necessary for golden tests.
-Future<void> _loadIconFont() async {
-  final Directory flutterRoot = Directory(path.dirname(Platform.script.toFilePath())).parent.parent;
-  final File iconFont = File(path.joinAll(<String>[
-    flutterRoot.path,
-    'bin',
-    'cache',
-    'artifacts',
-    'material_fonts',
-    'MaterialIcons-Regular.otf'
-  ]));
-
-  final Future<ByteData> bytes = Future<ByteData>.value(
-      iconFont.readAsBytesSync()
-      .buffer
-      .asByteData()
-  );
-
-  await (FontLoader('MaterialIcons')..addFont(bytes)).load();
 }