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;}