MIPS: Simplify pending message script handling.

src/mips64/full-codegen-mips64.cc

Index: src/mips64/full-codegen-mips64.cc
diff --git a/src/mips64/full-codegen-mips64.cc b/src/mips64/full-codegen-mips64.cc
index 9ca6e5d07b911f8f097136f995c2e05b23bf8d13..f128a400ba8f00338c56f1ba949e6cdb76806457 100644
--- a/src/mips64/full-codegen-mips64.cc
+++ b/src/mips64/full-codegen-mips64.cc
@@ -5338,12 +5338,6 @@ void FullCodeGenerator::EnterFinallyBlock() {
   __ ld(a1, MemOperand(at));
   __ SmiTag(a1);
   __ push(a1);
-
-  ExternalReference pending_message_script =
-      ExternalReference::address_of_pending_message_script(isolate());
-  __ li(at, Operand(pending_message_script));
-  __ ld(a1, MemOperand(at));
-  __ push(a1);
 }
 
 
@@ -5351,12 +5345,6 @@ void FullCodeGenerator::ExitFinallyBlock() {
   DCHECK(!result_register().is(a1));
   // Restore pending message from stack.
   __ pop(a1);
-  ExternalReference pending_message_script =
-      ExternalReference::address_of_pending_message_script(isolate());
-  __ li(at, Operand(pending_message_script));
-  __ sd(a1, MemOperand(at));
-
-  __ pop(a1);
   __ SmiUntag(a1);
   ExternalReference has_pending_message =
       ExternalReference::address_of_has_pending_message(isolate());