Question:
How to remove Other Attendees who Incurred Expense from Other Attendees section in CRM?
Answer:
As long as the Attendee_list_vod__c field is on the page layout, the Other Attendees who Incurred Expense is going to display. The only way to prevent that is to remove that field from the page layout.
Related Documentation:
CRM Help Documentation: Configuring Call Report Expense