Deprecate gfe2_reloadable_flag_quic_bbrv2_ignore_inflight_lo.

PiperOrigin-RevId: 329317630
Change-Id: I261f9276c6eb67ee362285ca2208893d5ee632be

quic/core/congestion_control/bbr2_sender.cc

diff --git a/quic/core/congestion_control/bbr2_sender.cc b/quic/core/congestion_control/bbr2_sender.cc
index 3c7ba2f..90fc785 100644
--- a/quic/core/congestion_control/bbr2_sender.cc
+++ b/quic/core/congestion_control/bbr2_sender.cc
@@ -115,9 +115,7 @@
     QUIC_RELOADABLE_FLAG_COUNT_N(quic_bbr2_fewer_startup_round_trips, 2, 2);
     params_.startup_full_bw_rounds = 2;
   }
-  if (GetQuicReloadableFlag(quic_bbr2_ignore_inflight_lo) &&
-      config.HasClientRequestedIndependentOption(kB2LO, perspective)) {
-    QUIC_RELOADABLE_FLAG_COUNT(quic_bbr2_ignore_inflight_lo);
+  if (config.HasClientRequestedIndependentOption(kB2LO, perspective)) {
     params_.ignore_inflight_lo = true;
   }
   if (GetQuicReloadableFlag(quic_bbr2_limit_inflight_hi) &&