Remove yaml_edit dependency on quiver_hashcode (dart-lang/yaml_edit#61)

pkgs/yaml_edit/pubspec.yaml

diff --git a/pkgs/yaml_edit/pubspec.yaml b/pkgs/yaml_edit/pubspec.yaml
index a33cc09..f143892 100644
--- a/pkgs/yaml_edit/pubspec.yaml
+++ b/pkgs/yaml_edit/pubspec.yaml
@@ -6,7 +6,6 @@
 issue_tracker: https://github.com/google/dart-neats/labels/pkg:yaml_edit
 dependencies:
   meta: ^1.1.8
-  quiver_hashcode: ^2.0.0
   yaml: ^2.2.1
   source_span: ^1.7.0
   collection: ^1.14.11