Fix issues with UBSAN test configuration.

On Apple the test feature 'sanitizer-new-delete' was incorrectly
getting added to the LIT feature set, which mistakenly caused tests
to be disabled when using UBSAN (the feature is only needed with ASAN/MSAN/TSAN).

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@307518 91177308-0d34-0410-b5e6-96231b3b80d8

test/libcxx/experimental/containers/sequences/dynarray/dynarray.cons/default_throws_bad_alloc.pass.cpp

@@ -16,7 +16,7 @@
 // UNSUPPORTED: c++98, c++03, c++11
 
 // The sanitizers replace new/delete with versions that do not throw bad_alloc.
-// UNSUPPORTED: sanitizer-new-delete, ubsan
+// UNSUPPORTED: sanitizer-new-delete
 
 
 #include <experimental/dynarray>

utils/libcxx/test/target_info.py

@@ -169,10 +169,6 @@ class DarwinLocalTI(DefaultTargetInfo):
         # should be available in libc++ directly.
         return False
 
-    def add_sanitizer_features(self, sanitizer_type, features):
-        if sanitizer_type == 'Undefined':
-            features.add('sanitizer-new-delete')
-
 
 class FreeBSDLocalTI(DefaultTargetInfo):
     def __init__(self, full_config):