Deprecate FLAGS_quic_disable_pre_30. Remove QUIC versions [25-29].

net/quic/quic_connection.cc

Index: net/quic/quic_connection.cc
diff --git a/net/quic/quic_connection.cc b/net/quic/quic_connection.cc
index ed58d1eb8ee6a0fdb3a2407f0becadfc6445e879..f32b1ed31fd4ef5899cce70cb92128bcc4bc8fb2 100644
--- a/net/quic/quic_connection.cc
+++ b/net/quic/quic_connection.cc
@@ -1235,7 +1235,7 @@ void QuicConnection::SendRstStream(QuicStreamId id,
   packet_generator_.AddControlFrame(QuicFrame(new QuicRstStreamFrame(
       id, AdjustErrorForVersion(error, version()), bytes_written)));
 
-  if (error == QUIC_STREAM_NO_ERROR && version() > QUIC_VERSION_28) {
+  if (error == QUIC_STREAM_NO_ERROR) {
     // All data for streams which are reset with QUIC_STREAM_NO_ERROR must
     // be received by the peer.
     return;