removeFace 
  Removes a face through which the NetworkEndPoint at endPoint.pos connects to this ProtoNetwork.
Return
- trueif endPoint was completely removed from this ProtoNetwork
- falseif endPoint is still connected through other faces
Removes a face through which the NetworkEndPoint at endPoint.pos connects to this ProtoNetwork.
true if endPoint was completely removed from this ProtoNetwork
false if endPoint is still connected through other faces