Remove error_log() call which is trace from cluster_view.php

[jh23453]

When displaying a cluster view I get this message in apache's error.log:

reports = Array\n(\n [load_report] => load_one\n [cpu_report] => 1\n [mem_report] => 1\n [network_report] => 1\n [packet_report] => 1\n)\n

For me it looks like a trace - lets remove it.