base::Bind: Cleanup almost-unused OldCompletionCallbacks.

net/disk_cache/in_flight_backend_io.h

Index: net/disk_cache/in_flight_backend_io.h
diff --git a/net/disk_cache/in_flight_backend_io.h b/net/disk_cache/in_flight_backend_io.h
index aa6979c559ad1fb517e71a5bfb9159eccd4400a1..8d4024a0d1e97ba20f6f5bacd68fa7dabc4b7c28 100644
--- a/net/disk_cache/in_flight_backend_io.h
+++ b/net/disk_cache/in_flight_backend_io.h
@@ -156,19 +156,13 @@ class InFlightBackendIO : public InFlightIO {
   void CreateEntry(const std::string& key, Entry** entry,
                    net::OldCompletionCallback* callback);
   void DoomEntry(const std::string& key, net::OldCompletionCallback* callback);
-  void DoomAllEntries(net::OldCompletionCallback* callback);
   void DoomAllEntries(const net::CompletionCallback& callback);
   void DoomEntriesBetween(const base::Time initial_time,
                           const base::Time end_time,
-                          net::OldCompletionCallback* callback);
-  void DoomEntriesBetween(const base::Time initial_time,
-                          const base::Time end_time,
                           const net::CompletionCallback& callback);
   void DoomEntriesSince(const base::Time initial_time,
                         net::OldCompletionCallback* callback);
   void OpenNextEntry(void** iter, Entry** next_entry,
-                     net::OldCompletionCallback* callback);
-  void OpenNextEntry(void** iter, Entry** next_entry,
                      const net::CompletionCallback& callback);
   void OpenPrevEntry(void** iter, Entry** prev_entry,
                      net::OldCompletionCallback* callback);