Fix compilation with GCC 5.2

test/cctest/compiler/test-js-typed-lowering.cc

Index: test/cctest/compiler/test-js-typed-lowering.cc
diff --git a/test/cctest/compiler/test-js-typed-lowering.cc b/test/cctest/compiler/test-js-typed-lowering.cc
index bac511dd2d867777c3948a9141572e004fe6a594..125384da789afa12dbf5877de06157c9c74650f2 100644
--- a/test/cctest/compiler/test-js-typed-lowering.cc
+++ b/test/cctest/compiler/test-js-typed-lowering.cc
@@ -219,10 +219,6 @@ static Type* kNumberTypes[] = {
     Type::OrderedNumber(), Type::PlainNumber(), Type::Number()};
 
 
-static Type* kJSTypes[] = {Type::Undefined(), Type::Null(),   Type::Boolean(),
-                           Type::Number(),    Type::String(), Type::Object()};
-
-
 static Type* I32Type(bool is_signed) {
   return is_signed ? Type::Signed32() : Type::Unsigned32();
 }