Remove QuicString wrapper for std::string

gfe-relnote: n/a (no functional change)
PiperOrigin-RevId: 238124961
Change-Id: I36e66a4326b4118d70effd356aef9734d2893763
diff --git a/quic/core/stateless_rejector_test.cc b/quic/core/stateless_rejector_test.cc
index cf5cdd0..f8757e1 100644
--- a/quic/core/stateless_rejector_test.cc
+++ b/quic/core/stateless_rejector_test.cc
@@ -5,6 +5,7 @@
 #include "net/third_party/quiche/src/quic/core/stateless_rejector.h"
 
 #include <memory>
+#include <string>
 #include <vector>
 
 #include "net/third_party/quiche/src/quic/core/crypto/crypto_handshake_message.h"
@@ -15,7 +16,6 @@
 #include "net/third_party/quiche/src/quic/platform/api/quic_logging.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_ptr_util.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_str_cat.h"
-#include "net/third_party/quiche/src/quic/platform/api/quic_string.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_string_piece.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_test.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_text_utils.h"