revert commit for changelog

Author: Telomelonia

pkgs/test_core/CHANGELOG.md

@@ -1,8 +1,3 @@
-## 0.6.16
-
-* Add `-s`/`--summary` flag to print a list of failed tests at the end of the
-  run for the compact and expanded reporters.
-
 ## 0.6.15
 
 * Add `--coverage-package` flag, which filters the coverage report to specific

pkgs/test_core/pubspec.yaml

@@ -1,5 +1,5 @@
 name: test_core
-version: 0.6.16
+version: 0.6.15
 description: A basic library for writing tests and running them on the VM.
 repository: https://github.com/dart-lang/test/tree/master/pkgs/test_core
 issue_tracker: https://github.com/dart-lang/test/issues?q=is%3Aissue+is%3Aopen+label%3Apackage%3Atest