docs: def remove_router_interface(self, context, router_info):
          """Removes previously configured interface from router on Arista HW.
  
          This deals with both IPv6 and IPv4 configurations.
          """
          if router_info:
              router_name = self._arista_router_name(router_info['id'],
                                                     router_info['name'])
              mlag_peer_failed = False
              for s in self._servers:
                  try:
                      self.delete_interface_from_router(router_info['seg_id'],
                                                        router_name, s)
                      if self._mlag_configured:
                          mlag_peer_failed = False
                  except Exception:
                      if self._mlag_configured and not mlag_peer_failed:
                          mlag_peer_failed = True
                      else:
                          msg = (_('Failed to add interface to router '
                                   '%s on EOS') % router_name)
                          LOG.exception(msg)
                          raise arista_exc.AristaServicePluginRpcError(msg=msg)