Remove unused attribute from Kentik settings

gso/oss-params-example.json

@@ -119,7 +119,6 @@
     "bgp_type": "device",
     "bgp_lookup_strategy": "lu_global_fallback",
     "ASN": 137,
-    "route_selection": "both directions",
     "snmp_community": "secret community string",
     "md5_password": "snmp password"
   }

gso/settings.py

@@ -186,7 +186,6 @@ class KentikParams(BaseSettings):
     bgp_type: str
     bgp_lookup_strategy: str
     ASN: int
-    route_selection: str
     snmp_community: str
     md5_password: str