fix(language-service): Remove getTemplateReferences() from LanguageService API (#33807)

The method `getTemplateReferences()` appears in both the LanguageService
interface and LanguageServiceHost interface. It should belong in the
latter and not the former, since the former deals with the semantics of
the language and not the mechanics.

PR Close #33807

packages/language-service/src/language_service.ts

@@ -28,11 +28,6 @@ export function createLanguageService(host: TypeScriptServiceHost): LanguageServ
 class LanguageServiceImpl implements LanguageService {
   constructor(private readonly host: TypeScriptServiceHost) {}
 
-  getTemplateReferences(): string[] {
-    this.host.getAnalyzedModules();  // same role as 'synchronizeHostData'
-    return this.host.getTemplateReferences();
-  }
-
   getDiagnostics(fileName: string): tss.Diagnostic[] {
     const analyzedModules = this.host.getAnalyzedModules();  // same role as 'synchronizeHostData'
     const results: Diagnostic[] = [];