gfe-relnote: Deprecate gfe2_reloadable_flag_quic_call_write_mem_slices.

PiperOrigin-RevId: 239672921
Change-Id: Ic185e1621f8c7f3995a905ecb20ebee8a7c8a592

quic/core/http/quic_spdy_stream.cc

diff --git a/quic/core/http/quic_spdy_stream.cc b/quic/core/http/quic_spdy_stream.cc
index 20330eb..6d15292 100644
--- a/quic/core/http/quic_spdy_stream.cc
+++ b/quic/core/http/quic_spdy_stream.cc
@@ -262,10 +262,6 @@
 QuicConsumedData QuicSpdyStream::WritevBody(const struct iovec* iov,
                                             int count,
                                             bool fin) {
-  if (!GetQuicReloadableFlag(quic_call_write_mem_slices)) {
-    return WritevData(iov, count, fin);
-  }
-  QUIC_RELOADABLE_FLAG_COUNT(quic_call_write_mem_slices);
   QuicMemSliceStorage storage(
       iov, count,
       session()->connection()->helper()->GetStreamSendBufferAllocator(),