Changes

vty: Drop SS7 route info in 'show cnlink'

Route information is nowadays a complex topic which is mostly handled by
libosmo-sigtran, and it can be configured and better queried using VTY
commands also provided by libosmo-sigtran.
This SS7 route information here is not relevant and moreover the API it
uses is deprecated. Drop it.

Change-Id: I2b029e99da45408f9fed41f9f280d19eb646d548