Revert "Add hack for working with old nym gateways"

This reverts commit 7129de4373.
To avoid breaking wss

common/client-core/src/client/topology_control/nym_api_provider.rs

@@ -69,7 +69,7 @@ impl NymApiTopologyProvider {
             Ok(mixes) => mixes,
         };
 
-        let gateways = match self.validator_client.get_cached_gateways().await {
+        let gateways = match self.validator_client.get_cached_described_gateways().await {
             Err(err) => {
                 error!("failed to get network gateways - {err}");
                 return None;

common/client-core/src/init/helpers.rs

@@ -67,7 +67,7 @@ pub async fn current_gateways<R: Rng>(
 
     log::trace!("Fetching list of gateways from: {nym_api}");
 
-    let gateways = client.get_cached_gateways().await?;
+    let gateways = client.get_cached_described_gateways().await?;
     let valid_gateways = gateways
         .into_iter()
         .filter_map(|gateway| gateway.try_into().ok())