diff --git a/src/services/compiler/ast.ts b/src/services/compiler/ast.ts
deleted file mode 100644
index e69de29bb2d..00000000000
diff --git a/src/services/compiler/astHelpers.ts b/src/services/compiler/astHelpers.ts
deleted file mode 100644
index e69de29bb2d..00000000000
diff --git a/src/services/compiler/astWalker.ts b/src/services/compiler/astWalker.ts
deleted file mode 100644
index e69de29bb2d..00000000000
diff --git a/src/services/compiler/references.ts b/src/services/compiler/references.ts
index b2d605d595f..750b7777624 100644
--- a/src/services/compiler/references.ts
+++ b/src/services/compiler/references.ts
@@ -6,9 +6,6 @@
 /////<reference path='document.ts' />
 /////<reference path='flags.ts' />
 /////<reference path='hashTable.ts' />
-/////<reference path='ast.ts' />
-/////<reference path='astHelpers.ts' />
-/////<reference path='astWalker.ts' />
 /////<reference path='base64.ts' />
 /////<reference path='sourceMapping.ts' />
 /////<reference path='emitter.ts' />
diff --git a/src/services/syntax/depthLimitedWalker.ts b/src/services/syntax/depthLimitedWalker.ts
deleted file mode 100644
index e69de29bb2d..00000000000
diff --git a/src/services/syntax/references.ts b/src/services/syntax/references.ts
index aaba33ca383..e425fda3936 100644
--- a/src/services/syntax/references.ts
+++ b/src/services/syntax/references.ts
@@ -34,8 +34,6 @@
 // SyntaxInformationMap depends on SyntaxWalker
 // ///<reference path='syntaxNodeInvariantsChecker.ts' />
 
-// DepthLimitedWalker depends on PositionTrackingWalker
-///<reference path='depthLimitedWalker.ts' />
 ///<reference path='parser.ts' />
 
 // Concrete nodes depend on the parser.