Remove strong mode support from rest argument creation.

src/ia32/interface-descriptors-ia32.cc

Index: src/ia32/interface-descriptors-ia32.cc
diff --git a/src/ia32/interface-descriptors-ia32.cc b/src/ia32/interface-descriptors-ia32.cc
index 3c96a7de5d825767fbc5a9dfe04bb0f4b825110e..ad381c7eb28905e81a9d4f39262bc1968773eb0c 100644
--- a/src/ia32/interface-descriptors-ia32.cc
+++ b/src/ia32/interface-descriptors-ia32.cc
@@ -71,7 +71,6 @@ const Register ArgumentsAccessNewDescriptor::parameter_pointer() { return edx; }
 const Register RestParamAccessDescriptor::parameter_count() { return ecx; }
 const Register RestParamAccessDescriptor::parameter_pointer() { return edx; }
 const Register RestParamAccessDescriptor::rest_parameter_index() { return ebx; }
-const Register RestParamAccessDescriptor::language_mode() { return edi; }
 
 
 const Register ApiGetterDescriptor::function_address() { return edx; }