Merge pull request #46 from dart-lang/pq-patch-1

remove redundant experiment
diff --git a/analysis_options.yaml b/analysis_options.yaml
index 986bccc..ae67bc0 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -4,9 +4,6 @@
   strong-mode:
     implicit-casts: false
 
-  enable-experiment:
-  - non-nullable
-
 linter:
   rules:
     - avoid_function_literals_in_foreach_calls