Remove obsolete workaround from FunctionTester.

src/compiler/js-generic-lowering.cc

Index: src/compiler/js-generic-lowering.cc
diff --git a/src/compiler/js-generic-lowering.cc b/src/compiler/js-generic-lowering.cc
index 68cc1cea9053358bbd5a065647e8300b83bdc56e..08cb89ada18888ef389172b62e46f19f4973c5b8 100644
--- a/src/compiler/js-generic-lowering.cc
+++ b/src/compiler/js-generic-lowering.cc
@@ -474,8 +474,6 @@ Node* JSGenericLowering::LowerJSInstanceOf(Node* node) {
 
 Node* JSGenericLowering::LowerJSLoadContext(Node* node) {
   ContextAccess access = OpParameter<ContextAccess>(node);
-  // TODO(mstarzinger): Use simplified operators instead of machine operators
-  // here so that load/store optimization can be applied afterwards.
   for (int i = 0; i < access.depth(); ++i) {
     node->ReplaceInput(
         0, graph()->NewNode(
@@ -492,8 +490,6 @@ Node* JSGenericLowering::LowerJSLoadContext(Node* node) {
 
 Node* JSGenericLowering::LowerJSStoreContext(Node* node) {
   ContextAccess access = OpParameter<ContextAccess>(node);
-  // TODO(mstarzinger): Use simplified operators instead of machine operators
-  // here so that load/store optimization can be applied afterwards.
   for (int i = 0; i < access.depth(); ++i) {
     node->ReplaceInput(
         0, graph()->NewNode(