Bug 36088: Remove useless code form opac-account-pay.pl

The script opac-account-pay.pl sums the selected accountlines, formats the amount, pulls the currently active currency, and does nothing with any of this data.

Test Plan:
1) Apply this patch
2) Restart all the things!
3) Note there is no change in behavior

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Pedro Amorim <pedro.amorim@ptfs-europe.com>

PA amended title (missing 'Bug ####:'

Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit dd7ac62d3f)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit ebf8d687cc)
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>

opac/opac-account-pay.pl

@@ -54,15 +54,6 @@ my ( $template, $borrowernumber, $cookie ) = get_template_and_user(
     }
 );
 
-my $amount_to_pay =
-  Koha::Database->new()->schema()->resultset('Accountline')->search( { accountlines_id => { -in => \@accountlines } } )
-  ->get_column('amountoutstanding')->sum();
-$amount_to_pay = sprintf( "%.2f", $amount_to_pay );
-
-my $active_currency = Koha::Acquisition::Currencies->get_active;
-
-my $error = 0;
-
 Koha::Plugins::Handler->run(
     {
         class  => $payment_method,