Update analysis_options.yaml

pkgs/pool/analysis_options.yaml

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