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diff --git a/lib/DBIx/Class/Storage/DBI/MultiColumnIn.pm b/lib/DBIx/Class/Storage/DBI/MultiColumnIn.pm
deleted file mode 100644
index 30d7299..0000000
--- a/lib/DBIx/Class/Storage/DBI/MultiColumnIn.pm
+++ /dev/null
@@ -1,62 +0,0 @@
-package DBIx::Class::Storage::DBI::MultiColumnIn;
-
-use strict;
-use warnings;
-
-use base 'DBIx::Class::Storage::DBI';
-use mro 'c3';
-
-=head1 NAME 
-
-DBIx::Class::Storage::DBI::MultiColumnIn - Storage component for RDBMS supporting multicolumn in clauses
-
-=head1 DESCRIPTION
-
-While ANSI SQL does not define a multicolumn in operator, many databases can
-in fact understand WHERE (cola, colb) IN ( SELECT subcol_a, subcol_b ... )
-The storage class for any such RDBMS should inherit from this class, in order
-to dramatically speed up update/delete operations on joined multipk resultsets.
-
-At this point the only overridden method is C<_multipk_update_delete()>
-
-=cut
-
-sub _multipk_update_delete {
-  my $self = shift;
-  my ($rs, $op, $values) = @_;
-
-  my $rsrc = $rs->result_source;
-  my @pcols = $rsrc->_pri_cols;
-  my $attrs = $rs->_resolved_attrs;
-
-  # naive check - this is an internal method after all, we should know what we are doing 
-  $self->throw_exception ('Number of columns selected by supplied resultset does not match number of primary keys')
-    if ( ref $attrs->{select} ne 'ARRAY' or @{$attrs->{select}} != @pcols );
-
-  # This is hideously ugly, but SQLA does not understand multicol IN expressions
-  my $sqla = $self->_sql_maker;
-  my ($sql, @bind) = @${$rs->as_query};
-  $sql = sprintf ('(%s) IN %s',   # the as_query stuff is already enclosed in ()s
-    join (', ', map { $sqla->_quote ($_) } @pcols),
-    $sql,
-  );
-
-  return $self->$op (
-    $rsrc,
-    $op eq 'update' ? $values : (),
-    \[$sql, @bind],
-  );
-
-}
-
-=head1 AUTHORS
-
-See L<DBIx::Class/CONTRIBUTORS>
-
-=head1 LICENSE
-
-You may distribute this code under the same terms as Perl itself.
-
-=cut
-
-1;