Fix a couple of 'unused variable' warnings in a vector test. NFC.

llvm-svn: 337016
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 3f7d20904f0f01b1cf9742ee9a3f0f83072ad6a7
diff --git a/test/std/containers/sequences/vector/iterators.pass.cpp b/test/std/containers/sequences/vector/iterators.pass.cpp
index a1ce2be..33093e1 100644
--- a/test/std/containers/sequences/vector/iterators.pass.cpp
+++ b/test/std/containers/sequences/vector/iterators.pass.cpp
@@ -77,6 +77,8 @@
         typedef std::vector<T> C;
         C::iterator i;
         C::const_iterator j;
+        (void) i;
+        (void) j;
     }
 #if TEST_STD_VER >= 11
     {
@@ -125,6 +127,8 @@
         typedef std::vector<T, min_allocator<T>> C;
         C::iterator i;
         C::const_iterator j;
+        (void) i;
+        (void) j;
     }
     {
         typedef A T;