[turbofan] Kill type Guard nodes during effect/control linearization.

src/compiler/instruction-selector.cc

Index: src/compiler/instruction-selector.cc
diff --git a/src/compiler/instruction-selector.cc b/src/compiler/instruction-selector.cc
index 41ab1379136071cb1a8fab7f459f2fc6da378b37..88cc2e536cfe5345f54f4f04a7e3693caa660316 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -858,8 +858,6 @@ void InstructionSelector::VisitNode(Node* node) {
       return MarkAsReference(node), VisitIfException(node);
     case IrOpcode::kFinishRegion:
       return MarkAsReference(node), VisitFinishRegion(node);
-    case IrOpcode::kGuard:
-      return MarkAsReference(node), VisitGuard(node);
     case IrOpcode::kParameter: {
       MachineType type =
           linkage()->GetParameterType(ParameterIndexOf(node->op()));
@@ -1444,13 +1442,6 @@ void InstructionSelector::VisitFinishRegion(Node* node) {
 }
 
 
-void InstructionSelector::VisitGuard(Node* node) {
-  OperandGenerator g(this);
-  Node* value = node->InputAt(0);
-  Emit(kArchNop, g.DefineSameAsFirst(node), g.Use(value));
-}
-
-
 void InstructionSelector::VisitParameter(Node* node) {
   OperandGenerator g(this);
   int index = ParameterIndexOf(node->op());