Automatic ClangTidyReadability code cleanup.

PiperOrigin-RevId: 199769337
diff --git a/src/test/cpp/util/path_posix_test.cc b/src/test/cpp/util/path_posix_test.cc
index dd22f9b..f1262cd 100644
--- a/src/test/cpp/util/path_posix_test.cc
+++ b/src/test/cpp/util/path_posix_test.cc
@@ -25,9 +25,7 @@
 
 namespace blaze_util {
 
-using std::pair;
 using std::string;
-using std::vector;
 
 TEST(PathPosixTest, TestDirname) {
   // The Posix version of SplitPath (thus Dirname too, which is implemented on