You should be fine since it will be 48 hours until your surgery. The most important things to avoid before surgery are aspirin, advil, herbal preparations, etc. Many of these products have unknown compounds added which can interfere with bleeding and anesthesia. it's best to just avoid most of these prior to surgery.
Good morning! I counsel my patients not to have any green teas for at least a week before surgery- it can increase your postoperative bruising. I would urge you to be forthright with your PS about this and let him/her decide what would be best. I hope this helps