diff --git a/extensions/typescript-language-features/src/typescriptServiceClient.ts b/extensions/typescript-language-features/src/typescriptServiceClient.ts
index f9143fa10de..62533a9d249 100644
--- a/extensions/typescript-language-features/src/typescriptServiceClient.ts
+++ b/extensions/typescript-language-features/src/typescriptServiceClient.ts
@@ -888,7 +888,7 @@ export default class TypeScriptServiceClient extends Disposable implements IType
 	}
 
 	private dispatchTelemetryEvent(telemetryData: Proto.TelemetryEventBody): void {
-		const properties: ObjectMap<string> = Object.create(null);
+		const properties: { [key: string]: string } = Object.create(null);
 		switch (telemetryData.telemetryEventName) {
 			case 'typingsInstalled':
 				const typingsInstalledPayload: Proto.TypingsInstalledTelemetryEventPayload = (telemetryData.payload as Proto.TypingsInstalledTelemetryEventPayload);
diff --git a/extensions/typescript-language-features/src/typings/collections.d.ts b/extensions/typescript-language-features/src/typings/collections.d.ts
deleted file mode 100644
index c67debc0ed3..00000000000
--- a/extensions/typescript-language-features/src/typings/collections.d.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-/*---------------------------------------------------------------------------------------------
- *  Copyright (c) Microsoft Corporation. All rights reserved.
- *  Licensed under the MIT License. See License.txt in the project root for license information.
- *--------------------------------------------------------------------------------------------*/
-
-interface ObjectMap<V> {
-	[key: string]: V;
-}
\ No newline at end of file