[turbofan] Remove extra attributes from SimplifiedOperatorBuilder methods.

src/compiler/simplified-operator-reducer-unittest.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/graph-unittest.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/simplified-operator.h"
 #include "src/compiler/simplified-operator-reducer.h"
 #include "src/compiler/typer.h"
 #include "src/conversions.h"
@@ skipping 111 matching lines @@
 }  // namespace
 
 
 // -----------------------------------------------------------------------------
 // Unary operators
 
 
 namespace {
 
 struct UnaryOperator {
-  const Operator* (SimplifiedOperatorBuilder::*constructor)() const;
+  const Operator* (SimplifiedOperatorBuilder::*constructor)();
   const char* constructor_name;
 };
 
 
 std::ostream& operator<<(std::ostream& os, const UnaryOperator& unop) {
   return os << unop.constructor_name;
 }
 
 
 static const UnaryOperator kUnaryOperators[] = {
@@ skipping 331 matching lines @@
         Reduce(graph()->NewNode(simplified()->ChangeUint32ToTagged(),
                                 Int32Constant(bit_cast<int32_t>(n))));
     ASSERT_TRUE(reduction.Changed());
     EXPECT_THAT(reduction.replacement(), IsNumberConstant(FastUI2D(n)));
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8