Fix Step 1 Rust CI warnings

Signed-off-by: Andrew Harvard <aharvard@squareup.com>

Author: aharvard

crates/goose/src/acp/server_factory.rs

@@ -1,6 +1,6 @@
 use crate::acp::server::{AcpProviderFactory, GooseAcpAgent};
-use anyhow::Result;
 use crate::agents::GoosePlatform;
+use anyhow::Result;
 use std::sync::Arc;
 use tracing::info;
 

crates/goose/src/agents/extension_manager.rs

@@ -710,7 +710,6 @@ impl ExtensionManager {
                     .map(|(k, v)| (k.clone(), substitute_env_vars(v, &all_envs)))
                     .collect();
                 let resolved_socket = socket.as_ref().map(|s| substitute_env_vars(s, &all_envs));
-                let capability = self.mcp_client_capabilities();
                 create_streamable_http_client(
                     &resolved_uri,
                     *timeout,