PPC: Remove strong mode support from rest argument creation.

src/full-codegen/ppc/full-codegen-ppc.cc

Index: src/full-codegen/ppc/full-codegen-ppc.cc
diff --git a/src/full-codegen/ppc/full-codegen-ppc.cc b/src/full-codegen/ppc/full-codegen-ppc.cc
index fedea95cf822c05186a71ba1677a7801b71e468e..a31537a5247e75a5e5bc49069b399999fb8bc494 100644
--- a/src/full-codegen/ppc/full-codegen-ppc.cc
+++ b/src/full-codegen/ppc/full-codegen-ppc.cc
@@ -279,9 +279,6 @@ void FullCodeGenerator::Generate() {
             Operand(StandardFrameConstants::kCallerSPOffset + offset));
     __ LoadSmiLiteral(RestParamAccessDescriptor::rest_parameter_index(),
                       Smi::FromInt(rest_index));
-    __ LoadSmiLiteral(RestParamAccessDescriptor::language_mode(),
-                      Smi::FromInt(language_mode()));
-    DCHECK(r4.is(RestParamAccessDescriptor::language_mode()));
     function_in_register_r4 = false;
 
     RestParamAccessStub stub(isolate());