Reverting 9094

utils/pub/pubspec.dart

Index: utils/pub/pubspec.dart
diff --git a/utils/pub/pubspec.dart b/utils/pub/pubspec.dart
index 6fe4ff8cba8c4930052e18dc6d486f79b2331bec..d038779acd5ffc17cf125ddb657aba43926b141d 100644
--- a/utils/pub/pubspec.dart
+++ b/utils/pub/pubspec.dart
@@ -59,11 +59,7 @@ class Pubspec {
       }
 
       dependencyEntries.forEach((name, spec) {
-        var description, source;
-        // TODO(nweiz): The correct default for versionConstraint is new
-        // VersionRange(), but that won't work until the version solver is
-        // hooked in.
-        var versionConstraint = Version.none;
+        var description, source, versionConstraint;
         if (spec == null) {
           description = name;
           source = sources.defaultSource;