diff --git a/src/services/coreServices.ts b/src/services/coreServices.ts
deleted file mode 100644
index 0f725d3d6be..00000000000
--- a/src/services/coreServices.ts
+++ /dev/null
@@ -1,49 +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='classifier.ts' />
-///<reference path='languageService.ts' />
-///<reference path='formatting\formatting.ts' />
-
-// Access to "Debug" object 
-var debugObjectHost = (<any>this);
-
-module TypeScript.Services {
-
-    export interface ICoreServicesHost {
-        logger: TypeScript.Logger;
-    }
-
-    export class CoreServices {
-        constructor (public host: ICoreServicesHost) {
-        }
-
-        public getPreProcessedFileInfo(fileName: string, sourceText: TypeScript.IScriptSnapshot): TypeScript.IPreProcessedFileInfo {
-            return TypeScript.preProcessFile(fileName, sourceText);
-        }
-
-        public getDefaultCompilationSettings(): ts.CompilerOptions {
-            return getDefaultCompilerOptions();
-        }
-
-        public collectGarbage(): void {
-            if (!debugObjectHost || !debugObjectHost.CollectGarbage) {
-                throw new Error(TypeScript.getDiagnosticMessage(TypeScript.DiagnosticCode.This_version_of_the_Javascript_runtime_does_not_support_the_0_function, ['collectGarbage()']));
-            }
-
-            debugObjectHost.CollectGarbage();
-        }
-    }
-}
diff --git a/src/services/shims.ts b/src/services/shims.ts
index 6efbceecc52..de49c57687f 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -14,9 +14,8 @@
 //
 
 ///<reference path='typescriptServices.ts' />
-
+
var debugObjectHost = (<any>this);

 module TypeScript.Services {
-
     export interface IScriptSnapshotShim {
         // Get's a portion of the script snapshot specified by [start, end).  
         getText(start: number, end: number): string;
@@ -805,17 +804,12 @@ module TypeScript.Services {
     }
 
     class CoreServicesShimObject extends ShimBase implements CoreServicesShim {
-        public logger: TypeScript.Logger;
-        public services: CoreServices;
-
-        constructor(factory: ShimFactory, public host: ICoreServicesHost) {
+        constructor(factory: ShimFactory, public host: Logger) {
             super(factory);
-            this.logger = this.host.logger;
-            this.services = new CoreServices(this.host);
         }
 
         private forwardJSONCall(actionDescription: string, action: () => any): any {
-            return forwardJSONCall(this.logger, actionDescription, action);
+            return forwardJSONCall(this.host, actionDescription, action);
         }
 
         ///
@@ -825,7 +819,7 @@ module TypeScript.Services {
             return this.forwardJSONCall(
                 "getPreProcessedFileInfo(\"" + fileName + "\")",
                 () => {
-                    var result = this.services.getPreProcessedFileInfo(fileName, sourceText);
+                    var result = TypeScript.preProcessFile(fileName, sourceText);
                     return result;
                 });
         }
@@ -837,7 +831,7 @@ module TypeScript.Services {
             return this.forwardJSONCall(
                 "getDefaultCompilationSettings()",
                 () => {
-                    return compilerOptionsToCompilationSettings(this.services.getDefaultCompilationSettings());
+                    return compilerOptionsToCompilationSettings(getDefaultCompilerOptions());
                 });
         }
     }
@@ -868,12 +862,12 @@ module TypeScript.Services {
             }
         }
 
-        public createCoreServicesShim(host: ICoreServicesHost): CoreServicesShim {
+        public createCoreServicesShim(host: Logger): CoreServicesShim {
             try {
                 return new CoreServicesShimObject(this, host);
             }
             catch (err) {
-                logInternalError(host.logger, err);
+                logInternalError(host, err);
                 throw err;
             }
         }
diff --git a/src/services/typescriptServices.ts b/src/services/typescriptServices.ts
index 27f17723e13..d4af024bd31 100644
--- a/src/services/typescriptServices.ts
+++ b/src/services/typescriptServices.ts
@@ -22,7 +22,6 @@
 
 /// <reference path='syntax\incrementalParser.ts' />
 
-/// <reference path='coreServices.ts' />
 /// <reference path='classifier.ts' />
 /// <reference path='languageService.ts' />
 /// <reference path='pullLanguageService.ts' />