Revert "Add DoubleTestOp instruction"

runtime/vm/il_printer.cc

Index: runtime/vm/il_printer.cc
diff --git a/runtime/vm/il_printer.cc b/runtime/vm/il_printer.cc
index 7a6874f71f620dd5d6f7bb9fce3945afb6cfdb7b..d8d18f3bbfb1b69fd303d9fff5365b8157c83ba2 100644
--- a/runtime/vm/il_printer.cc
+++ b/runtime/vm/il_printer.cc
@@ -726,21 +726,6 @@ void BinaryDoubleOpInstr::PrintOperandsTo(BufferFormatter* f) const {
 }
 
 
-void DoubleTestOpInstr::PrintOperandsTo(BufferFormatter* f) const {
-  switch (op_kind()) {
-    case MethodRecognizer::kDouble_getIsNaN:
-      f->Print("IsNaN ");
-      break;
-    case MethodRecognizer::kDouble_getIsInfinite:
-      f->Print("IsInfinite ");
-      break;
-    default:
-      UNREACHABLE();
-  }
-  value()->PrintTo(f);
-}
-
-
 void BinaryFloat32x4OpInstr::PrintOperandsTo(BufferFormatter* f) const {
   f->Print("%s, ", Token::Str(op_kind()));
   left()->PrintTo(f);