Remove some unnecessary using directives from tests.

net/tools/quic/quic_time_wait_list_manager_test.cc

Index: net/tools/quic/quic_time_wait_list_manager_test.cc
diff --git a/net/tools/quic/quic_time_wait_list_manager_test.cc b/net/tools/quic/quic_time_wait_list_manager_test.cc
index 74790ebba5b2405a75249ebc576bc79bf4f6b1a1..a409ead8ca5c840a9d1f70a36834e12d1c5a3e61 100644
--- a/net/tools/quic/quic_time_wait_list_manager_test.cc
+++ b/net/tools/quic/quic_time_wait_list_manager_test.cc
@@ -27,13 +27,6 @@
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using net::test::kTestPort;
-using net::test::BuildUnsizedDataPacket;
-using net::test::NoOpFramerVisitor;
-using net::test::QuicVersionMax;
-using net::test::QuicVersionMin;
-using net::test::MockPacketWriter;
-
 using testing::Args;
 using testing::Assign;
 using testing::DoAll;