Reset pin of 16U2 on UNOR3

I was just curious, Why the reset pin of 16U2 on Arduino UNO R3 is not connected to any pullup resistor?
Any clue?

It is pulled up with a 10K resistor.

1.jpg

Dumb me.I should've looked the eagle files. Thank you for the answer.
Another question,
Why the Vin pin is not connected after D1, Why they didn't connect it before the D1 as to protect from accidental reverse polarity connections ?