Remove the code to store and load QUIC server configs in the disk cache.

net/quic/chromium/quic_server_info.cc

Index: net/quic/chromium/quic_server_info.cc
diff --git a/net/quic/chromium/quic_server_info.cc b/net/quic/chromium/quic_server_info.cc
index 23f4cf8ab24eebc508f90ba84b3a5109ff1fc882..3e53fa5e9b714f9a90cded10008eb7601ee56c27 100644
--- a/net/quic/chromium/quic_server_info.cc
+++ b/net/quic/chromium/quic_server_info.cc
@@ -146,6 +146,4 @@ string QuicServerInfo::SerializeInner() const {
   return string(reinterpret_cast<const char*>(p.data()), p.size());
 }
 
-QuicServerInfoFactory::~QuicServerInfoFactory() {}
-
 }  // namespace net