clean: Remove useless code

Author: CGNonofr

src/languageClient.ts

@@ -1,6 +1,6 @@
 import * as monaco from 'monaco-editor'
 import {
-  CloseAction, ErrorAction, MonacoLanguageClient, Emitter, Event, TextDocument, Services, State, DisposableCollection, CancellationToken, RequestType, NotificationType, Disposable, LogMessageNotification
+  CloseAction, ErrorAction, MonacoLanguageClient, Emitter, Event, TextDocument, Services, State, DisposableCollection, CancellationToken, RequestType, NotificationType, LogMessageNotification
 } from 'monaco-languageclient'
 import delay from 'delay'
 import { Uri } from 'monaco-editor'
@@ -263,8 +263,6 @@ export class LanguageClientManager implements LanguageClient {
   }
 }
 
-const languageClientManagerByLanguageId: Partial<Record<string, LanguageClientManager>> = {}
-
 /**
  * Create a language client manager
  * @param id The predefined id of the language client
@@ -276,9 +274,6 @@ function createLanguageClientManager (
   id: LanguageClientId,
   infrastructure: Infrastructure
 ): LanguageClientManager {
-  if (languageClientManagerByLanguageId[id] != null) {
-    throw new Error(`Language client for language ${id} already started`)
-  }
   let languageServerOptions = getLanguageClientOptions(id)
   // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
   if (languageServerOptions == null) {
@@ -299,10 +294,6 @@ function createLanguageClientManager (
   disposableCollection.push(installServices(infrastructure))
 
   const languageClientManager = new LanguageClientManager(id, languageServerOptions, infrastructure)
-  languageClientManagerByLanguageId[id] = languageClientManager
-  disposableCollection.push(Disposable.create(() => {
-    delete languageClientManagerByLanguageId[id]
-  }))
 
   disposableCollection.push(registerTextModelContentProvider('file', {
     async provideTextContent (resource: Uri): Promise<monaco.editor.ITextModel | null> {
@@ -322,16 +313,6 @@ function createLanguageClientManager (
   return languageClientManager
 }
 
-function getAllLanguageClientManagers (): LanguageClientManager[] {
-  return Object.values(languageClientManagerByLanguageId) as LanguageClientManager[]
-}
-
-function getAllLanguageClientManagersByTextDocument (textDocument: TextDocument): LanguageClientManager[] {
-  return getAllLanguageClientManagers().filter(manager => manager.isModelManaged(textDocument))
-}
-
 export {
-  createLanguageClientManager,
-  getAllLanguageClientManagers,
-  getAllLanguageClientManagersByTextDocument
+  createLanguageClientManager
 }