Fix QUIC warnings in preparation for enabling them

gfe-relnote: n/a, compilation-only change
PiperOrigin-RevId: 253893322
Change-Id: I15917a1c5b325922850086277cfad5e3b4da20a4
diff --git a/quic/core/quic_packet_reader.cc b/quic/core/quic_packet_reader.cc
index d2dfd22..bd46c69 100644
--- a/quic/core/quic_packet_reader.cc
+++ b/quic/core/quic_packet_reader.cc
@@ -179,6 +179,11 @@
   // We may not have read all of the packets available on the socket.
   return packets_read == kNumPacketsPerReadMmsgCall;
 #else
+  (void)fd;
+  (void)port;
+  (void)clock;
+  (void)processor;
+  (void)packets_dropped;
   QUIC_LOG(FATAL) << "Unsupported";
   return false;
 #endif