Hide information in units

Add this custom CSS in :

WP Admin->Appearance->Customize->Custom CSS

For hiding tags in units

.unit_content #unit ul.tags{
display:none;
}

For hiding print button:

.unit_content #unit .print_unit{
display:none;
}

For hiding time

.unit_content #unit .print_unit+span{
display:none;
}

For hiding right side instructor in unit

.unit_content #unit .instructor{
display:none;}