Revert "Use scheduled_test for Pub tests."

utils/tests/pub/install/git/require_pubspec_test.dart

Index: utils/tests/pub/install/git/require_pubspec_test.dart
diff --git a/utils/tests/pub/install/git/require_pubspec_test.dart b/utils/tests/pub/install/git/require_pubspec_test.dart
index 084bbe0def44ba9a52de868d3f59707970e31276..ffc0b60abc234c6935ba9ab4ad27c4a828ce9685 100644
--- a/utils/tests/pub/install/git/require_pubspec_test.dart
+++ b/utils/tests/pub/install/git/require_pubspec_test.dart
@@ -6,18 +6,17 @@ library pub_tests;
 
 import 'dart:io';
 
-import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
   integration('requires the dependency to have a pubspec', () {
     ensureGit();
 
-    d.git('foo.git', [
-      d.libDir('foo')
-    ]).create();
+    git('foo.git', [
+      libDir('foo')
+    ]).scheduleCreate();
 
-    d.appDir([{"git": "../foo.git"}]).create();
+    appDir([{"git": "../foo.git"}]).scheduleCreate();
 
     // TODO(nweiz): clean up this RegExp when either issue 4706 or 4707 is
     // fixed.