Remove undefined and unused QuicSpdyStream::set_max_uncompressed_header_bytes() declaration.

gfe-relnote: n/a, no behavioral change.
PiperOrigin-RevId: 308165073
Change-Id: I2190ea1a26ad59ac961fb71400e9998278b11db0

quic/core/http/quic_spdy_session.h

diff --git a/quic/core/http/quic_spdy_session.h b/quic/core/http/quic_spdy_session.h
index d641d51..2d84bf7 100644
--- a/quic/core/http/quic_spdy_session.h
+++ b/quic/core/http/quic_spdy_session.h
@@ -446,9 +446,6 @@
   // Initializes HTTP/3 unidirectional streams if not yet initialzed.
   virtual void MaybeInitializeHttp3UnidirectionalStreams();
 
-  void set_max_uncompressed_header_bytes(
-      size_t set_max_uncompressed_header_bytes);
-
   void SendMaxPushId();
 
  private: