Revert "Use native async/await support in pub."

sdk/lib/_internal/pub_generated/test/utils_test.dart

Index: sdk/lib/_internal/pub_generated/test/utils_test.dart
diff --git a/sdk/lib/_internal/pub/test/utils_test.dart b/sdk/lib/_internal/pub_generated/test/utils_test.dart
similarity index 81%
copy from sdk/lib/_internal/pub/test/utils_test.dart
copy to sdk/lib/_internal/pub_generated/test/utils_test.dart
index a137d2d079094cfa0ad8429dec33f37955513b1e..178b7f753881bd06ae5a41c6d4347e3ee7831393 100644
--- a/sdk/lib/_internal/pub/test/utils_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/utils_test.dart
@@ -43,8 +43,13 @@ main() {
     });
 
     test('uses indentation for maps', () {
-      expect(yamlToString({'a': {'b': 1, 'c': 2}, 'd': 3}),
-          equals("""
+      expect(yamlToString({
+        'a': {
+          'b': 1,
+          'c': 2
+        },
+        'd': 3
+      }), equals("""
 a:
   b: 1
   c: 2
@@ -52,8 +57,12 @@ d: 3"""));
     });
 
     test('sorts map keys', () {
-      expect(yamlToString({'a': 1, 'c': 2, 'b': 3, 'd': 4}),
-          equals("""
+      expect(yamlToString({
+        'a': 1,
+        'c': 2,
+        'b': 3,
+        'd': 4
+      }), equals("""
 a: 1
 b: 3
 c: 2
@@ -61,8 +70,11 @@ d: 4"""));
     });
 
     test('quotes map keys as needed', () {
-      expect(yamlToString({'no': 1, 'yes!': 2, '123': 3}),
-          equals("""
+      expect(yamlToString({
+        'no': 1,
+        'yes!': 2,
+        '123': 3
+      }), equals("""
 "123": 3
 no: 1
 "yes!": 2"""));
@@ -74,8 +86,7 @@ no: 1
       map[123] = "num";
       map[true] = "bool";
 
-      expect(yamlToString(map),
-          equals("""
+      expect(yamlToString(map), equals("""
 123: num
 null: null
 true: bool"""));
@@ -83,7 +94,10 @@ true: bool"""));
 
     test('handles empty maps', () {
       expect(yamlToString({}), equals("{}"));
-      expect(yamlToString({'a': {}, 'b': {}}), equals("""
+      expect(yamlToString({
+        'a': {},
+        'b': {}
+      }), equals("""
 a: {}
 b: {}"""));
     });