Update .travis.yml
diff --git a/pkgs/package_config/.travis.yml b/pkgs/package_config/.travis.yml
index 24d56a3..655bf3d 100644
--- a/pkgs/package_config/.travis.yml
+++ b/pkgs/package_config/.travis.yml
@@ -2,7 +2,6 @@
 sudo: false
 dart:
   - dev
-  - stable
 dart_task:
   - test
   - dartfmt