Remove outdated comment

This was only relevant for repmgr3 and earlier; in repmgr4 the schema
is hard-coded.

dbutils.c

@@ -3546,10 +3546,6 @@ _create_event(PGconn *conn, t_configuration_options *options, int node_id, char
 
 	/*
 	 * Only attempt to write a record if a connection handle was provided.
-	 * Also check that the repmgr schema has been properly initialised - if
-	 * not it means no configuration file was provided, which can happen with
-	 * e.g. `repmgr standby clone`, and we won't know which schema to write
-	 * to.
 	 */
 	if (conn != NULL && PQstatus(conn) == CONNECTION_OK)
 	{