Remove previous implementation

Author: bigmontz

src/internal/connection-provider-routing.js

@@ -22,7 +22,6 @@ import { READ, WRITE } from '../driver'
 import Session from '../session'
 import RoutingTable from './routing-table'
 import Rediscovery from './rediscovery'
-import { RoutingTableGetterFactory } from './routing-table-getter'
 import { HostNameResolver } from './node'
 import SingleConnectionProvider from './connection-provider-single'
 import PooledConnectionProvider from './connection-provider-pooled'