Minor - Remove useless quoting

main/inc/lib/extra_field_value.lib.php

@@ -861,8 +861,8 @@ class ExtraFieldValue extends Model
                 INNER JOIN {$this->table_handler_field} sf
                 ON (s.field_id = sf.id)
                 WHERE
-                    field_id = '".$fieldId."' AND
-                    item_id = '$itemId' AND
+                    field_id = $fieldId AND
+                    item_id = $itemId AND
                     sf.extra_field_type = $extraFieldType
                 ORDER BY s.value";
         $result = Database::query($sql);