[turbofan] Remove obsolete JSDebugger operator.

src/compiler/typer.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/base/flags.h"
 #include "src/bootstrapper.h"
 #include "src/compiler/graph-reducer.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/node.h"
 #include "src/compiler/node-properties.h"
@@ skipping 1536 matching lines @@
       // The string::length property is always an unsigned smi.
       return Bounds(Type::None(), Type::Intersect(Type::UnsignedSmall(),
                                                   Type::TaggedSigned()));
     default:
       break;
   }
   return Bounds::Unbounded(zone());
 }
 
 
-Bounds Typer::Visitor::TypeJSDebugger(Node* node) {
-  UNREACHABLE();
-  return Bounds();
-}
-
-
 Bounds Typer::Visitor::TypeJSStackCheck(Node* node) {
   return Bounds::Unbounded(zone());
 }
 
 
 // Simplified operators.
 
 
 Bounds Typer::Visitor::TypeBooleanNot(Node* node) {
   return Bounds(Type::None(zone()), Type::Boolean(zone()));
@@ skipping 684 matching lines @@
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
 #undef TYPED_ARRAY_CASE
     }
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8