[turbofan] Remove Instruction::IsControl() and Instruction::MarkAsControl()

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 8b4eba57751fedd981753cd6a18dcd3f2b1461f5..3eb46db828ee5773a7ea688ddfb8135c319d6ef1 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -961,7 +961,7 @@ void InstructionSelector::VisitConstant(Node* node) {
 void InstructionSelector::VisitGoto(BasicBlock* target) {
   // jump to the next block.
   OperandGenerator g(this);
-  Emit(kArchJmp, g.NoOutput(), g.Label(target))->MarkAsControl();
+  Emit(kArchJmp, g.NoOutput(), g.Label(target));
 }