Deprecate FLAGS_quic_reloadable_flag_quic_only_5rto_client_side in the disabled state, now that it'…

net/quic/core/quic_connection.cc

Index: net/quic/core/quic_connection.cc
diff --git a/net/quic/core/quic_connection.cc b/net/quic/core/quic_connection.cc
index 3bc93ab051023a0243b9dd72f3c64d35c8907589..56e8c33e2625320e96c2d93321d5a6e00cc8e146 100644
--- a/net/quic/core/quic_connection.cc
+++ b/net/quic/core/quic_connection.cc
@@ -343,10 +343,7 @@ void QuicConnection::SetFromConfig(const QuicConfig& config) {
     ack_decimation_delay_ = kShortAckDecimationDelay;
   }
   if (config.HasClientSentConnectionOption(k5RTO, perspective_)) {
-    if (perspective_ == Perspective::IS_CLIENT ||
-        !FLAGS_quic_reloadable_flag_quic_only_5rto_client_side) {
-      close_connection_after_five_rtos_ = true;
-    }
+    close_connection_after_five_rtos_ = true;
   }
 }