Remove the dependency on json schema compiler.

tools/json_schema_compiler/test/idl_other_namespace_sub_namespace.idl

Index: tools/json_schema_compiler/test/idl_other_namespace_sub_namespace.idl
diff --git a/tools/json_schema_compiler/test/idl_other_namespace_sub_namespace.idl b/tools/json_schema_compiler/test/idl_other_namespace_sub_namespace.idl
deleted file mode 100644
index 0d6a2cc71e2602036d5436c76f1d274f2acf5344..0000000000000000000000000000000000000000
--- a/tools/json_schema_compiler/test/idl_other_namespace_sub_namespace.idl
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright 2014 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.
-
-// Provides types for testing scoped types included in idl_basics.idl.
-
-namespace idl_other_namespace.sub_namespace {
-  enum AnotherType {
-    hello,
-    world
-  };
-};