Suppress semantic errors in js/ts notebook cells (#212367)

Fixes #212366

extensions/typescript-language-features/src/languageProvider.ts

@@ -9,6 +9,7 @@ import { CommandManager } from './commands/commandManager';
 import { DocumentSelector } from './configuration/documentSelector';
 import * as fileSchemes from './configuration/fileSchemes';
 import { LanguageDescription } from './configuration/languageDescription';
+import { Schemes } from './configuration/schemes';
 import { DiagnosticKind } from './languageFeatures/diagnostics';
 import FileConfigurationManager from './languageFeatures/fileConfigurationManager';
 import { TelemetryReporter } from './logging/telemetry';
@@ -145,6 +146,11 @@ export default class LanguageProvider extends Disposable {
 			return;
 		}
 
+		// Disable semantic errors in notebooks until we have better notebook support
+		if (diagnosticsKind === DiagnosticKind.Semantic && file.scheme === Schemes.notebookCell) {
+			return;
+		}
+
 		const config = vscode.workspace.getConfiguration(this.id, file);
 		const reportUnnecessary = config.get<boolean>('showUnused', true);
 		const reportDeprecated = config.get<boolean>('showDeprecated', true);