Revert stub show_pretty that will be obsoleted by graphql.

server/src/bin/server.rs

@@ -17,7 +17,6 @@ use rocket_cors::{AllowedHeaders, AllowedOrigins};
 use server::{
     error::ServerError,
     graphql::{GraphqlSchema, QueryRoot},
-    nm::threadset_to_messages,
 };
 use shared::Message;
 
@@ -58,9 +57,9 @@ async fn search(
 async fn show_pretty(
     nm: &State<Notmuch>,
     query: &str,
-) -> Result<Json<Vec<Message>>, Debug<ServerError>> {
+) -> Result<Json<ThreadSet>, Debug<ServerError>> {
     let query = urlencoding::decode(query).map_err(|e| ServerError::from(NotmuchError::from(e)))?;
-    let res = threadset_to_messages(nm.show(&query).map_err(ServerError::from)?)?;
+    let res = nm.show(&query).map_err(ServerError::from)?;
     Ok(Json(res))
 }