Remove redundant database instances (#7535)

app/call_center_active/call_center_active_inc.php

@@ -38,9 +38,6 @@
 		exit;
 	}
 
-//initialize the database object
-	$database = new database;
-
 //add multi-lingual support
 	$language = new text;
 	$text = $language->get();

app/call_center_active/call_center_exec.php

@@ -125,7 +125,6 @@
 			$sql .= "where domain_uuid = '$domain_uuid' ";
 			$sql .= "and username = '".$username."' ";
 			$parameters['user_status'] = trim($user_status, "'");
-			$database = new database;
 			$database->execute($sql, $parameters);
 			unset($sql, $parameters);
 		}

app/call_center_active/call_center_queue.php

@@ -62,7 +62,6 @@
 		$sql .= "and ".$sql_search;
 	}
 	$parameters['domain_uuid'] = $_SESSION['domain_uuid'];
-	$database = new database;
 	$num_rows = $database->select($sql, $parameters, 'column');
 
 //paging the records
@@ -77,7 +76,6 @@
 	$sql = str_replace('count(*)', '*', $sql);
 	$sql .= order_by($order_by, $order);
 	$sql .= limit_offset($rows_per_page, $offset);
-	$database = new database;
 	$call_center_queues = $database->select($sql, $parameters, 'all');
 	unset($sql, $parameters);