Remove duplicate definition of orte_xml_output - thanks Shiqing for catching it!

This commit was SVN r20017.

orte/runtime/orte_globals.c

@@ -53,7 +53,6 @@ bool orted_spin_flag = false;
 bool orte_static_ports = false;
 bool orte_keep_fqdn_hostnames = false;
 bool orte_tag_output;
-bool orte_xml_output;
 int orted_debug_failure;
 int orted_debug_failure_delay;
 bool orte_homogeneous_nodes = false;