Removed function "getnetworkhashps"

Removed function "getnetworkhashps" (below). This causes an error on daemons that do not have getnetworkhashps as an rpc call.

[b]$net_speed = getnetworkhashps ();[/b]
		
		if ($net_speed != "")
		{
			echo "		<div class=\"node_detail\">\n";
			echo "			<span class=\"node_desc\">Network H/s:</span><br>\n";
			echo "			".$net_speed."\n";
			echo "		</div>\n";
			echo "\n";
		}