Remove the dependency on json schema compiler.

tools/json_schema_compiler/test/idl_namespace_all_platforms.idl

Index: tools/json_schema_compiler/test/idl_namespace_all_platforms.idl
diff --git a/tools/json_schema_compiler/test/idl_namespace_all_platforms.idl b/tools/json_schema_compiler/test/idl_namespace_all_platforms.idl
deleted file mode 100644
index 7ffd84a60046509eac710265fa5ca4a166d80bc3..0000000000000000000000000000000000000000
--- a/tools/json_schema_compiler/test/idl_namespace_all_platforms.idl
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright 2013 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.
-
-// Tests a variety of basic API definition features.
-
-[platforms=("chromeos", "chromeos_touch", "linux", "mac", "win")]
-namespace idl_namespace_all_platforms {
-
-};