Remove dartc optimizing backend.

dart/compiler/java/com/google/dart/compiler/backend/common/TypeHeuristic.java

Index: dart/compiler/java/com/google/dart/compiler/backend/common/TypeHeuristic.java
diff --git a/dart/compiler/java/com/google/dart/compiler/backend/common/TypeHeuristic.java b/dart/compiler/java/com/google/dart/compiler/backend/common/TypeHeuristic.java
deleted file mode 100644
index de304193ea7ee72f6717e0fa102f9bb26e28f6db..0000000000000000000000000000000000000000
--- a/dart/compiler/java/com/google/dart/compiler/backend/common/TypeHeuristic.java
+++ /dev/null
@@ -1,47 +0,0 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-package com.google.dart.compiler.backend.common;
-
-import com.google.dart.compiler.ast.DartExpression;
-import com.google.dart.compiler.resolver.FieldElement;
-import com.google.dart.compiler.resolver.MethodElement;
-import com.google.dart.compiler.type.DynamicType;
-import com.google.dart.compiler.type.Type;
-
-import java.util.Set;
-
-/**
- * Interface for providing information about the types of expressions to backends.
- */
-public interface TypeHeuristic {
-
-  public enum FieldKind {
-    GETTER, SETTER
-  }
-
-  /**
-   * Provides the list of all possible types of the given expression. This list may be used for
-   * optimization, and must therefore include all possible types of the given expression. If the
-   * type is unknown, it must return a list containing a single {@link DynamicType}.
-   */
-  public abstract Set<Type> getTypesOf(DartExpression expr);
-
-  /**
-   * Returns true if types is <'dynamic'> or the set contains more than one type. false otherwise.
-   */
-  public abstract boolean isDynamic(Set<Type> types);
-
-  /**
-   * Returns the set of method implementations for a given expression.
-   */
-  public abstract Set<MethodElement> getImplementationsOf(DartExpression expr);
-
-  /**
-   * Returns the set of field implementations for a given expression.
-   */
-  public abstract Set<FieldElement> getFieldImplementationsOf(DartExpression expr,
-                                                              FieldKind asGetter);
-
-}