Remove QuicString wrapper for std::string

gfe-relnote: n/a (no functional change)
PiperOrigin-RevId: 238124961
Change-Id: I36e66a4326b4118d70effd356aef9734d2893763
diff --git a/quic/core/http/end_to_end_test.cc b/quic/core/http/end_to_end_test.cc
index 61b6834..d7102de 100644
--- a/quic/core/http/end_to_end_test.cc
+++ b/quic/core/http/end_to_end_test.cc
@@ -7,6 +7,7 @@
 #include <list>
 #include <memory>
 #include <ostream>
+#include <string>
 #include <utility>
 #include <vector>
 
@@ -30,7 +31,6 @@
 #include "net/third_party/quiche/src/quic/platform/api/quic_sleep.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_socket_address.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_test_loopback.h"