Revert of Add new, unused methods to SpdyFramerVisitorInterface.

net/tools/flip_server/spdy_interface.cc

Index: net/tools/flip_server/spdy_interface.cc
diff --git a/net/tools/flip_server/spdy_interface.cc b/net/tools/flip_server/spdy_interface.cc
index d21b500ae9478fcd291723cf4894d406ff989daf..fb5d29075c7b172573489e7a7ca3d0798e3fc0ba 100644
--- a/net/tools/flip_server/spdy_interface.cc
+++ b/net/tools/flip_server/spdy_interface.cc
@@ -244,18 +244,6 @@
           << ", [" << len << "])";
 }
 
-SpdyHeadersHandlerInterface* SpdySM::OnHeaderFrameStart(
-    SpdyStreamId stream_id) {
-  LOG(FATAL) << ACCEPTOR_CLIENT_IDENT
-             << "SpdySM::OnHeaderFrameStart() not implemented.";
-  return nullptr;
-}
-
-void SpdySM::OnHeaderFrameEnd(SpdyStreamId stream_id, bool end_headers) {
-  LOG(FATAL) << ACCEPTOR_CLIENT_IDENT
-             << "SpdySM::OnHeaderFrameEnd() not implemented.";
-}
-
 void SpdySM::OnSynStream(SpdyStreamId stream_id,
                          SpdyStreamId associated_stream_id,
                          SpdyPriority priority,