Remove self from Crawls and Imports in actors at end of task

In case the user never listens to the stream so that I do not create
inifinitely growing hashmaps in the server memory.

src/handlers/import.rs

@@ -27,7 +27,7 @@ pub async fn opml(
         let import_id = Base62Uuid::new();
         let file_name = field.file_name().map(|s| s.to_string());
         let bytes = field.bytes().await?;
-        let receiver = importer.import(import_id, file_name, bytes).await;
+        let receiver = importer.import(import_id.as_uuid(), file_name, bytes).await;
         {
             let mut imports = imports.lock().await;
             imports.insert(import_id.as_uuid(), receiver);