[libc++] Remove test-suite annotations for unsupported Clang versions

Differential Revision: https://reviews.llvm.org/D108471

GitOrigin-RevId: 5425106e493e26f7e0a87077c8eca657a9aff293
diff --git a/test/std/algorithms/alg.modifying.operations/alg.reverse/reverse_copy.pass.cpp b/test/std/algorithms/alg.modifying.operations/alg.reverse/reverse_copy.pass.cpp
index 75d72fb..5334438 100644
--- a/test/std/algorithms/alg.modifying.operations/alg.reverse/reverse_copy.pass.cpp
+++ b/test/std/algorithms/alg.modifying.operations/alg.reverse/reverse_copy.pass.cpp
@@ -120,8 +120,6 @@
 int
 main()
 {
-    // clang-3.8 fails to correctly auto vectorize the loop in some cases of different types of container's elements,
-    // for example: int32_t and int8_t. This issue isn't detected for clang-3.9 and newer versions.
     test<int16_t, int8_t>();
     test<uint16_t, float32_t>();
     test<float64_t, int64_t>();