Remove hidden prototype for builtin functions.

src/runtime.h

Index: src/runtime.h
diff --git a/src/runtime.h b/src/runtime.h
index 581a6ab46a7f9de4bf351f3d99f4e6b7d8445e73..329312e96b9e373d9990d501dbe307648ceaa59c 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -69,7 +69,6 @@ namespace internal {
   \
   F(GetPrototype, 1, 1) \
   F(IsInPrototypeChain, 2, 1) \
-  F(SetHiddenPrototype, 2, 1) \
   \
   F(IsConstructCall, 0, 1) \
   \
@@ -144,7 +143,7 @@ namespace internal {
   F(StringAdd, 2, 1) \
   F(StringBuilderConcat, 3, 1) \
   F(StringBuilderJoin, 3, 1) \
-  F(SparseJoinWithSeparator, 3, 1)            \
+  F(SparseJoinWithSeparator, 3, 1) \
   \
   /* Bit operations */ \
   F(NumberOr, 2, 1) \