diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 69735803e2b..60d19b4a5d3 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -956,14 +956,8 @@ module ts {
         getDeclarationDiagnostics(sourceFile: SourceFile): Diagnostic[];
 
         // Gets a type checker that can be used to semantically analyze source fils in the program.
-        // The 'produceDiagnostics' flag determines if the checker will produce diagnostics while
-        // analyzing the code.  It can be set to 'false' to make many type checking operaitons 
-        // faster.  With this flag set, the checker can avoid codepaths only necessary to produce 
-        // diagnostics, but not necessary to answer semantic questions about the code.
-        //
-        // If 'produceDiagnostics' is false, then any calls to get diagnostics from the TypeChecker
-        // will throw an invalid operation exception.
         getTypeChecker(): TypeChecker;
+
         getCommonSourceDirectory(): string;
 
         // For testing purposes only.  Should not be used by any other consumers (including the