Thanks! I had it done with CSS but I am wondering how I could remove it the most easy way. It's possible with a template=forum_list check on PAGE_CONTAINER, but I thought it is more efficient just doing it in forum_list.
{$noH1} is a parameter which is set AFTER the PAGE_CONTAINER is rendered. It therefore cannot be overridden. And if it could, you would overwrite it using <xen:container (not <xen:set)
{$noH1} is true if the <xen:h1> tag is defined but empty, e.g.
<xen:h1></xen:h1>
or
<xen:h1 />
If there is no <xen:h1> tag then it uses <xen:title>. If there is neither of those, then it uses the Board Title.
The most efficient way is definitely a blank <xen:h1> tag and, that's basically how the Resource Manager does it in the Resource View.