Uniquify QuicCryptoServerConfig::Add[Default]Config

gfe-relnote: Use unique_ptr for memory management rather than bare pointer. No functional change intended, not flag-protected.
PiperOrigin-RevId: 238574036
Change-Id: I0bb803fb9d68925ecbfdf113ba70335a66b3f099
diff --git a/quic/core/crypto/crypto_server_test.cc b/quic/core/crypto/crypto_server_test.cc
index d654c4a..3b5a8f6 100644
--- a/quic/core/crypto/crypto_server_test.cc
+++ b/quic/core/crypto/crypto_server_test.cc
@@ -133,7 +133,7 @@
   void SetUp() override {
     QuicCryptoServerConfig::ConfigOptions old_config_options;
     old_config_options.id = kOldConfigId;
-    delete config_.AddDefaultConfig(rand_, &clock_, old_config_options);
+    config_.AddDefaultConfig(rand_, &clock_, old_config_options);
     clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(1000));
     std::unique_ptr<QuicServerConfigProtobuf> primary_config(
         config_.GenerateConfig(rand_, &clock_, config_options_));