Fix rust-analyzer warnings

Fix some warnings that rust-analyzer emits due to enabling all features.
These are annoying when you try to list all warnings in the entire
workspace.

common/client-libs/validator-client/src/nyxd/contract_traits/mixnet_signing_client.rs

@@ -932,6 +932,14 @@ mod tests {
             MixnetExecuteMsg::TestingResolveAllPendingEvents {} => {
                 client.testing_resolve_all_pending_events(None).ignore()
             }
+
+            // We add this entry purely to try to make rust-analyzer happy
+            #[cfg(not(feature = "nym_mixnet_contract_common/contract-testing"))]
+            _ => {
+                unimplemented!(
+                    "testing functionality is only available in contract-testing feature"
+                )
+            }
         };
     }
 }

sdk/rust/nym-sdk/examples/libp2p_ping/main.rs

@@ -45,7 +45,6 @@ use libp2p::ping::Success;
 use libp2p::swarm::{keep_alive, NetworkBehaviour, SwarmEvent};
 use libp2p::{identity, ping, Multiaddr, PeerId};
 use log::{debug, info, LevelFilter};
-use nym_sdk::mixnet::MixnetClient;
 use std::error::Error;
 use std::time::Duration;
 
@@ -70,7 +69,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
         use libp2p::swarm::SwarmBuilder;
         use rust_libp2p_nym::transport::NymTransport;
 
-        let client = MixnetClient::connect_new().await.unwrap();
+        let client = nym_sdk::mixnet::MixnetClient::connect_new().await.unwrap();
 
         let transport = NymTransport::new(client, local_key.clone()).await?;
         SwarmBuilder::with_tokio_executor(

sdk/rust/nym-sdk/examples/libp2p_shared/transport.rs

@@ -80,6 +80,7 @@ pub struct NymTransport {
 
 impl NymTransport {
     /// New transport.
+    #[allow(unused)]
     pub async fn new(client: MixnetClient, keypair: Keypair) -> Result<Self, Error> {
         Self::new_maybe_with_notify_inbound(client, keypair, None, None).await
     }