[j-nsp] Remove EX-4200 stack member

[Kevin Wormington]

I'm running a production stack of 3 EX-4200s using the stacking ports on 
9.6R1.3.  I would like to remove the 3rd member (no ports in use or 
configured) which is just in line-card mode without effecting the other 
two.  The units were all pre-provisioned.  I'm curious if anyone has 
attempted this and if they just pulled the stacking cables first and 
then made software changes or made software changes and then pulled the 
cables?

Thanks,

Kevin