Maybe, but it seems to me that it is better to play it safe and leave the bud. I'm no expert but I'm gonna guess just like the plant utilizes the fan leaves for stored nitrogen during flowering, the bud may play a role in nutrients during reflower... But heck, I guess I could be wrong on that. All I know is my baby is coming backYes but if you cut the bud off It will still have a growth point yes? as long as you leave a node where the bud was it will grow. I'm not saying to cut the buds off always for re veg, I just would have in the OPs situation. I wouldn't do it to the top cola etc as this would just be topping.
And one thing I found for reflowering is don't skimp on foliar feeding... My plants seem to really like clonex clone solution mixed in water - about 5-10ml to a quart... Don't know what possessed me to try that