Remove QuicString wrapper for std::string

gfe-relnote: n/a (no functional change)
PiperOrigin-RevId: 238124961
Change-Id: I36e66a4326b4118d70effd356aef9734d2893763
diff --git a/quic/core/quic_crypto_server_stream.h b/quic/core/quic_crypto_server_stream.h
index ec339e1..650f094 100644
--- a/quic/core/quic_crypto_server_stream.h
+++ b/quic/core/quic_crypto_server_stream.h
@@ -7,6 +7,7 @@
 
 #include <cstdint>
 #include <memory>
+#include <string>
 
 #include "base/macros.h"
 #include "net/third_party/quiche/src/quic/core/crypto/crypto_handshake.h"
@@ -17,7 +18,6 @@
 #include "net/third_party/quiche/src/quic/core/quic_crypto_stream.h"
 #include "net/third_party/quiche/src/quic/core/quic_session.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_export.h"
-#include "net/third_party/quiche/src/quic/platform/api/quic_string.h"
 
 namespace quic {