Simplify textDocument/didClose, we don't need to look up LSP again

helix-view/src/editor.rs

@@ -287,14 +287,9 @@ impl Editor {
 
         if close_buffer {
             // get around borrowck issues
-            let language_servers = &mut self.language_servers;
             let doc = &self.documents[view.doc];
 
-            let language_server = doc
-                .language
-                .as_ref()
-                .and_then(|language| language_servers.get(language).ok());
-            if let Some(language_server) = language_server {
+            if let Some(language_server) = doc.language_server() {
                 tokio::spawn(language_server.text_document_did_close(doc.identifier()));
             }
             self.documents.remove(view.doc);