remove needless alias

diff --git a/lib/SQL/Translator/Object/Constraint.pm b/lib/SQL/Translator/Object/Constraint.pm
index 96c598c..78688c5 100644 (file)
--- a/lib/SQL/Translator/Object/Constraint.pm
+++ b/lib/SQL/Translator/Object/Constraint.pm
@@ -30,7 +30,6 @@ class SQL::Translator::Object::Constraint extends SQL::Translator::Object {
             ## compat
             get_fields    => 'values',
             fields        => 'keys',
-            field_names   => 'keys',
         },
         default => sub { my %hash = (); tie %hash, 'Tie::IxHash'; return \%hash },
     );