External clock with Rev 3: cut traces coming from crystal

GNU Radio
1

Hi,

I have a rev 3 USRP and I will be using an external clock. Instructions
at http://gnuradio.utah.edu/trac/wiki/USRPClockingNotes report, among
other things “cut the traces coming from X2”.

Q1: Which of the X2 traces are coming from X2?

Q2: If I should cut all the X2 traces, why not just desolder X2?

Thank you,

Chris