diff --git a/src/services/compiler/diagnostics.ts b/src/services/compiler/diagnostics.ts
deleted file mode 100644
index 5114f83f9e5..00000000000
--- a/src/services/compiler/diagnostics.ts
+++ /dev/null
@@ -1,27 +0,0 @@
-//
-// Copyright (c) Microsoft Corporation.  All rights reserved.
-// 
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//   http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-///<reference path='references.ts' />
-
-module TypeScript {
-    export interface Logger {
-        log(s: string): void;
-    }
-
-    export class NullLogger implements Logger {
-        public log(s: string): void {
-        }
-    }
-}
\ No newline at end of file