Goal approval request notification template non editable

Summary:

Goal approval request notification template non editable 

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Hello experts, we have enabled the approval flow for the goal management: when an employee submit a new goals, his/her manager receive this notification with the possibility to approve/reject. Our requirement is to hide the highlighted fields (status, start date, target completion date, weight) as they are not requested. I've tried to delete these fields customizing in the xmlpserver the template of the report "PerformanceGoalRespApprovalNotificationReport" but the changes did not applied, those fields are still visible. Am I looking to the wrong report?