Deprecate gfe2_reloadable_flag_enable_quic_fec.

net/quic/quic_flags.cc

Index: net/quic/quic_flags.cc
diff --git a/net/quic/quic_flags.cc b/net/quic/quic_flags.cc
index a40af1e196297476178ef760bb89e89ba6ac3f29..c09ab437fe8b88a58924ce87741b98c1592421e3 100644
--- a/net/quic/quic_flags.cc
+++ b/net/quic/quic_flags.cc
@@ -11,11 +11,6 @@ bool FLAGS_quic_use_time_loss_detection = false;
 // CHLO.
 bool FLAGS_use_early_return_when_verifying_chlo = true;
 
-// If true, QUIC connections will support FEC protection of data while sending
-// packets, to reduce latency of data delivery to the application. The client
-// must also request FEC protection for the server to use FEC.
-bool FLAGS_enable_quic_fec = true;
-
 // When true, defaults to BBR congestion control instead of Cubic.
 bool FLAGS_quic_use_bbr_congestion_control = false;