ipc: remove an unused function prototype

ipc/ipc_logging.h

Index: ipc/ipc_logging.h
diff --git a/ipc/ipc_logging.h b/ipc/ipc_logging.h
index fd8c064301735998e51023cd1bc85d3260049e47..07f6c65dc76d8c6262b14e94f1f8762fc6d1da82 100644
--- a/ipc/ipc_logging.h
+++ b/ipc/ipc_logging.h
@@ -69,11 +69,6 @@ class Logging {
   void OnPostDispatchMessage(const Message& message,
                              const std::string& channel_id);
 
-  // Returns the name of the logging enabled/disabled events so that the
-  // sandbox can add them to to the policy.  If true, gets the name of the
-  // enabled event, if false, gets the name of the disabled event.
-  static std::wstring GetEventName(bool enabled);
-
   // Like the *MsgLog functions declared for each message class, except this
   // calls the correct one based on the message type automatically.  Defined in
   // ipc_logging.cc.