Revert "Make unittest follow the new package layout."

utils/tests/pub/test_pub.dart

Index: utils/tests/pub/test_pub.dart
diff --git a/utils/tests/pub/test_pub.dart b/utils/tests/pub/test_pub.dart
index 57f08acce93a5b302781c559f7b3ed3c53fc5ce2..d40fbec87941760d4e2070927e8c6e6497f9254d 100644
--- a/utils/tests/pub/test_pub.dart
+++ b/utils/tests/pub/test_pub.dart
@@ -16,7 +16,7 @@
 #import('dart:math');
 #import('dart:uri');
 
-#import('../../../pkg/unittest/lib/unittest.dart');
+#import('../../../pkg/unittest/unittest.dart');
 #import('../../lib/file_system.dart', prefix: 'fs');
 #import('../../pub/git_source.dart');
 #import('../../pub/hosted_source.dart');