You can remove those tab by removing filter. Pelase open project manager/class/project.php. In this file you will get this filter-$links = apply_filters( 'cpm_project_nav_links', $links, $project_id );. You can remove any tab you want.
Thank you for your prompt answer Nayem, much appreciated.
I have implemented that and it removes them perfectly.
I also noticed another area that the milestone reference remains: when a new post is made, there is a drop down list beneath the text area to assign the post to a milestone…can this dropdown also be removed?