Add message delete route.

src/routes/channels/mod.rs

@@ -2,6 +2,7 @@ use rocket::Route;
 
 mod delete_channel;
 mod fetch_channel;
+mod message_delete;
 mod message_edit;
 mod message_fetch;
 mod message_query;
@@ -14,6 +15,7 @@ pub fn routes() -> Vec<Route> {
         message_send::req,
         message_query::req,
         message_fetch::req,
-        message_edit::req
+        message_edit::req,
+        message_delete::req
     ]
 }