Remove unused push-related code from quic_spdy_client_session_base.h.

This includes a stray method declaration without matching definition.

PiperOrigin-RevId: 571097738

quiche/quic/core/http/quic_spdy_client_session_base.h

diff --git a/quiche/quic/core/http/quic_spdy_client_session_base.h b/quiche/quic/core/http/quic_spdy_client_session_base.h
index 77ca337..7657642 100644
--- a/quiche/quic/core/http/quic_spdy_client_session_base.h
+++ b/quiche/quic/core/http/quic_spdy_client_session_base.h
@@ -15,22 +15,7 @@
 
 namespace quic {
 
-class QuicClientPromisedInfo;
 class QuicClientPushPromiseIndex;
-class QuicSpdyClientStream;
-
-// For client/http layer code. Lookup promised streams based on
-// matching promised request url. The same map can be shared across
-// multiple sessions, since cross-origin pushes are allowed (subject
-// to authority constraints).  Clients should use this map to enforce
-// session affinity for requests corresponding to cross-origin push
-// promised streams.
-using QuicPromisedByUrlMap =
-    absl::flat_hash_map<std::string, QuicClientPromisedInfo*>;
-
-// The maximum time a promises stream can be reserved without being
-// claimed by a client request.
-const int64_t kPushPromiseTimeoutSecs = 60;
 
 // Base class for all client-specific QuicSession subclasses.
 class QUICHE_EXPORT QuicSpdyClientSessionBase
@@ -59,9 +44,6 @@
   // the PUSH_PROMISE frame, port if present there will be dropped.
   virtual bool IsAuthorized(const std::string& hostname) = 0;
 
-  // Removes |promised| from the maps by url.
-  void ErasePromisedByUrl(QuicClientPromisedInfo* promised);
-
   virtual void OnPushStreamTimedOut(QuicStreamId stream_id);
 
   // Release headers stream's sequencer buffer if it's empty.