Remove dartc optimizing backend.

deps/compiler.deps/DEPS

 # Copyright (c) 2012, 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.
 
 vars = {
   "gyp_rev": "@937",
   "co19_rev": "@119",
   "co19_repo": "http://co19.googlecode.com/svn/trunk/co19/",
   "dart_branch": "/branches/bleeding_edge/dart",
-  "closure_compiler_rev": "@1519",
 }
 
 deps = {
   "compiler":
     Var("dart_branch") + "/compiler",
 
   "corelib":
     Var("dart_branch") + "/corelib",
 
   "language":
@@ skipping 24 matching lines @@
   "third_party/gyp":
     "http://gyp.googlecode.com/svn/trunk" + Var("gyp_rev"),
 
   # Build time dependencies for dartc
   "third_party/apache_ant":
     Var("dart_branch") + "/third_party/apache_ant",
 
   "third_party/args4j":
     Var("dart_branch") + "/third_party/args4j",
 
-  "third_party/closure_compiler_src":
-    "http://closure-compiler.googlecode.com/svn/trunk" + Var("closure_compiler_rev"),
-
   "third_party/guava":
     Var("dart_branch") + "/third_party/guava",
 
   "third_party/hamcrest":
     Var("dart_branch") + "/third_party/hamcrest",
 
   "third_party/json":
     Var("dart_branch") + "/third_party/json",
 
   "third_party/junit":
@@ skipping 12 matching lines @@
 hooks = [
   {
     "pattern": ".",
     "action": ["python", "compiler/scripts/generate_my_projects.py"],
   },
   {
     "pattern": ".",
     "action": ["python", "tools/generate_projects.py", "compiler"],
   },
 ]