Hello,
please try adding this custom css in your wp-admin -> appearance -> customize -> custom css.
.edit_course_content div#course_curriculum .list-group-item div.wp-media-buttons button#add-h5p,
.edit_course_content div#course_curriculum .list-group-item div.wp-media-buttons a#insert_badgeos_shortcodes,
.edit_course_content div#course_curriculum .list-group-item div.wp-media-buttons a.thickbox.wplms-bbb-button.button,
.edit_course_content div#course_curriculum .list-group-item div.wp-media-buttons a.thickbox.button:last-child
{display: none !important;}
refer:
http://prntscr.com/ouyaqz