From d51dd84f6c8a7e422b29c15dccbac7fef4e0d2f2 Mon Sep 17 00:00:00 2001
From: Wesley Wigham <t-weswig@microsoft.com>
Date: Thu, 3 Dec 2015 14:18:44 -0800
Subject: [PATCH] remove unneeded cast

---
 src/compiler/checker.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index ebfc29d9550..9c9474eed4d 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -5573,8 +5573,8 @@ namespace ts {
                 }
 
                 if (source.typePredicate && target.typePredicate) {
-                    const sourcePredicate = source.typePredicate as IdentifierTypePredicate;
-                    const targetPredicate = target.typePredicate as IdentifierTypePredicate;
+                    const sourcePredicate = source.typePredicate;
+                    const targetPredicate = target.typePredicate;
                     if (source.typePredicate.kind !== target.typePredicate.kind) {
                         if (reportErrors) {
                             reportError(Diagnostics.A_this_based_type_guard_is_not_assignable_to_a_parameter_based_type_guard);