[noypiscripter]

For maintenance reasons, it is better to just hide the post count via CSS rather than editing existing templates which will require you to do (or resolve merge conflicts for) every time you upgrade. You can use the forum id which is present in the HTML as the selector (in the format of #forumnodeid) to distinguish which forum's count to hide. For example:

#forum123 .posts-count,
#forum456 .posts-count,
#forum789 .posts-count {
     visibility: hidden;
}