Here at OptimizePress we have two blogging themes.
If you are using the newer SmartTheme released back in 2017, please add the following code under “Appearance > theme options > custom scripts > css”
.op-comment-number {display: none;}
If you are using the older discontinued OptimizePress 2 theme, you may use the following code:
.post-meta a:last-child {display: none;}
Add the code to OptimizePress > Blog Settings > Modules > Other Scripts > choose Custom CSS in the drop down menu.