diff --git a/src/compiler/sourcemap.ts b/src/compiler/sourcemap.ts
index d98dc233c16..50644201544 100644
--- a/src/compiler/sourcemap.ts
+++ b/src/compiler/sourcemap.ts
@@ -14,7 +14,6 @@ namespace ts {
         reset(): void;
     }
 
-    const nop = <(...args: any[]) => any>Function.prototype;
     let nullSourceMapWriter: SourceMapWriter;
 
     export function getNullSourceMapWriter(): SourceMapWriter {