drop unused value

lib/IdPAccountManager/SAMLMetadata.pm

@@ -169,11 +169,6 @@ sub parse {
             }
         }
 
-        ## Merge domains in a single string
-        my $domains = join(',', @{ $data->{domain} })
-          if ($data->{domain});
-        $data->{domain} = $domains;
-
         push @array, $data;
     }