Remove strong mode support from rest argument creation.

src/mips64/code-stubs-mips64.cc

Index: src/mips64/code-stubs-mips64.cc
diff --git a/src/mips64/code-stubs-mips64.cc b/src/mips64/code-stubs-mips64.cc
index 2782df732c1298e413fa19b3621a7c55cf824f07..2531d6b3f1fd3ed676291449c389196f45b0c9cc 100644
--- a/src/mips64/code-stubs-mips64.cc
+++ b/src/mips64/code-stubs-mips64.cc
@@ -1972,7 +1972,6 @@ void RestParamAccessStub::GenerateNew(MacroAssembler* masm) {
   // a2 : number of parameters (tagged)
   // a3 : parameters pointer
   // a4 : rest parameter index (tagged)
-  // a1 : language mode (tagged)
   // Check if the calling frame is an arguments adaptor frame.
 
   Label runtime;
@@ -1990,7 +1989,7 @@ void RestParamAccessStub::GenerateNew(MacroAssembler* masm) {
 
   // Do the runtime call to allocate the arguments object.
   __ bind(&runtime);
-  __ Push(a2, a3, a4, a1);
+  __ Push(a2, a3, a4);
   __ TailCallRuntime(Runtime::kNewRestParam);
 }