refactor: remove defaultprops

Author: dcoa

src/schedule-and-details/basic-section/index.jsx

@@ -166,7 +166,6 @@ BasicSection.propTypes = {
   marketingEnabled: PropTypes.bool.isRequired,
   courseDisplayName: PropTypes.string.isRequired,
   platformName: PropTypes.string.isRequired,
-  isEditable: PropTypes.bool,
 };
 
 export default BasicSection;

src/schedule-and-details/schedule-section/index.jsx

@@ -178,7 +178,6 @@ ScheduleSection.propTypes = {
   certificateAvailableDate: PropTypes.string,
   certificatesDisplayBehavior: PropTypes.string.isRequired,
   canShowCertificateAvailableDateField: PropTypes.bool.isRequired,
-  showReadOnlyAlert: PropTypes.bool,
   onChange: PropTypes.func.isRequired,
 };