A 68 year old woman with atrial fibrillation and a CHA2DS2 VASc score of 5 is taking warfarin for stroke prevention. She is scheduled for an elective colonoscopy with possible polypectomy. Her INR is stable around 2.5. She has no history of stroke or venous thromboembolism in the past 3 months and no mechanical heart valve. According to current periprocedural anticoagulation recommendations, what is the best management of warfarin for this procedure?