config: removing deprecated bugfix_reverse_write_filter_order (#5956)

Signed-off-by: Alyssa Wilk <alyssar@chromium.org>

Mirrored from https://github.com/envoyproxy/envoy @ f2c2377c966fd58d37abc15c539ef311febba47b

envoy/api/v2/lds.proto

@@ -177,11 +177,5 @@ message Listener {
   // To set the queue length on macOS, set the net.inet.tcp.fastopen_backlog kernel parameter.
   google.protobuf.UInt32Value tcp_fast_open_queue_length = 12;
 
-  // If true, the order of write filters will be reversed to that of filters
-  // configured in the filter chain. Otherwise, it will keep the existing
-  // order. Note: this is a bug fix for Envoy, which is designed to have the
-  // reversed order of write filters to that of read ones, (see
-  // https://github.com/envoyproxy/envoy/issues/4599 for details). When we
-  // remove this field, Envoy will have the same behavior when it sets true.
-  google.protobuf.BoolValue bugfix_reverse_write_filter_order = 14 [deprecated = true];
+  reserved 14;
 }