Remove the dependency on json schema compiler.

tools/json_schema_compiler/dart_test/operatable_type.idl

Index: tools/json_schema_compiler/dart_test/operatable_type.idl
diff --git a/tools/json_schema_compiler/dart_test/operatable_type.idl b/tools/json_schema_compiler/dart_test/operatable_type.idl
deleted file mode 100644
index 9c5f53cc0ef0c16a8394c9a3396344c154a78199..0000000000000000000000000000000000000000
--- a/tools/json_schema_compiler/dart_test/operatable_type.idl
+++ /dev/null
@@ -1,32 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Top-level namespace-comment for operatableType
-namespace operatable_type {
-  dictionary DictType {
-    int x;
-    int y;
-  };
-
-  // Documentation for OperatableType.
-  dictionary OperatableType {
-    // Documentation for the String t.
-    DOMString t;
-
-    // Function returning nothing, taking nothing.
-    static void voidFunc();
-
-    // Function returning primitive type.
-    static int intRetFunc();
-
-    // Function returning dictionary.
-    static DictType dictRetFunc();
-
-    // Function taking primitive type.
-    static void intArgFunc(int i);
-
-    // Function taking dict type.
-    static void dictArgFunc(DictType d);
-  };
-};