Graph Templates has duplicate SQL delete statement

[netniV]

Describe the bug

The following diff should be applied (patch being applied shortly):

diff --git a/graph_templates.php b/graph_templates.php
index 21d8e66..304333c 100644
--- a/graph_templates.php
+++ b/graph_templates.php
@@ -238,9 +238,6 @@ function form_actions() {
                                        db_execute('DELETE FROM snmp_query_graph_rrd_sv
                                                WHERE snmp_query_graph_id IN (' . implode(', ', $snmp_graph_ids) . ')');

-                                       db_execute('DELETE FROM snmp_query_graph_rrd_sv
-                                               WHERE snmp_query_graph_id IN (' . implode(', ', $snmp_graph_ids) . ')');
-
                                        db_execute('DELETE FROM snmp_query_graph_sv
                                                WHERE snmp_query_graph_id IN (' . implode(', ', $snmp_graph_ids) . ')');

Whilst the query should be irrelevant, searching the indexes could potentially be time consuming depending on the database.