diff --git a/src/vs/workbench/api/electron-browser/mainThreadExtensionService.ts b/src/vs/workbench/api/electron-browser/mainThreadExtensionService.ts
index 4bbea670cc2..14b8d69f5dc 100644
--- a/src/vs/workbench/api/electron-browser/mainThreadExtensionService.ts
+++ b/src/vs/workbench/api/electron-browser/mainThreadExtensionService.ts
@@ -135,7 +135,6 @@ export class MainProcessExtensionService extends AbstractExtensionService<Activa
 	}
 
 	protected _showMessage(severity: Severity, msg: string): void {
-		this._proxy.$localShowMessage(severity, msg);
 		this.$localShowMessage(severity, msg);
 	}
 
diff --git a/src/vs/workbench/api/node/extHost.protocol.ts b/src/vs/workbench/api/node/extHost.protocol.ts
index df7977297c3..1dbe9058048 100644
--- a/src/vs/workbench/api/node/extHost.protocol.ts
+++ b/src/vs/workbench/api/node/extHost.protocol.ts
@@ -420,7 +420,6 @@ export abstract class ExtHostTreeViewsShape {
 }
 
 export abstract class ExtHostExtensionServiceShape {
-	$localShowMessage(severity: Severity, msg: string): void { throw ni(); }
 	$activateExtension(extensionDescription: IExtensionDescription): TPromise<void> { throw ni(); }
 }