NaCl cleanup: Remove not-very-useful debug logging in the plugin code

components/nacl/renderer/ppb_nacl_private.h

Index: components/nacl/renderer/ppb_nacl_private.h
diff --git a/components/nacl/renderer/ppb_nacl_private.h b/components/nacl/renderer/ppb_nacl_private.h
index c44c62a8cb221de5c49bcb9d6a41ea7086545bec..afaefa9ba9841afb9a4498d3bdddba9251c57bb8 100644
--- a/components/nacl/renderer/ppb_nacl_private.h
+++ b/components/nacl/renderer/ppb_nacl_private.h
@@ -281,8 +281,6 @@ struct PPB_NaCl_Private {
    * platform.
    */
   const char* (*GetSandboxArch)(void);
-  /* Logs the message via VLOG. */
-  void (*Vlog)(const char* message);
   /* Initializes internal state for a NaCl plugin. */
   void (*InitializePlugin)(PP_Instance instance,
                            uint32_t argc,