Hi Lazer,
We do not have any settings for this. If you want to achieve this, you would have to perform a template override on the module's file tree_item.php. Since I do not have your ftp access, I will explain the steps for you to do this.

1. Copy the tree_item.php file from:
JoomlaFolder\modules\mod_easydiscuss_categories\tmpl\tree_item.php
and paste it into the following(create the directory if it does not exist):
JoomlaFolder\templates\yourCurrentTemplate\html\mod_easydiscuss_categories\tree_item.php
2. Open the tree_item.php file.
3. Search for line 31 or the line containing these codes and remove them:

<li data-breadcrumb="·"><?php echo ED::themes()->getNouns('MOD_DISCUSSIONSCATEGORIES_SUBCATEGORIES_COUNT', $category->totalSubcategories, true);?></li>

Hope this helps. If you have any issues let us know, thanks.