Remove unused in-process pepper APIs

ppapi/api/dev/ppp_selection_dev.idl

Index: ppapi/api/dev/ppp_selection_dev.idl
diff --git a/ppapi/api/dev/ppp_selection_dev.idl b/ppapi/api/dev/ppp_selection_dev.idl
deleted file mode 100644
index 1d897895ed04a2c5247879a8478501783b138f43..0000000000000000000000000000000000000000
--- a/ppapi/api/dev/ppp_selection_dev.idl
+++ /dev/null
@@ -1,22 +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.
- */
-
-/**
- * This file defines the PPP_Selection_Dev interface.
- */
-
-label Chrome {
-  M13 = 0.3
-};
-
-interface PPP_Selection_Dev {
-  /**
-   * Returns the selection, either as plain text or as html depending on "html".
-   * If nothing is selected, or if the given format is unavailable, return a
-   * void string.
-   */
-  PP_Var GetSelectedText([in] PP_Instance instance,
-                         [in] PP_Bool html);
-};