WIP: [libcxx] [test] Try to remove the OS specific checks

Author: mstorsjo

libcxx/test/std/localization/locale.categories/category.numeric/locale.nm.put/facet.num.put.members/put_long_double.hex.pass.cpp

@@ -1846,10 +1846,7 @@ void test1() {
 void test2() {
   std::locale lc = std::locale::classic();
   std::locale lg(lc, new my_numpunct);
-#if (defined(__APPLE__) || defined(TEST_HAS_GLIBC) || defined(__MINGW32__)) && defined(__x86_64__) &&                  \
-    __LDBL_MANT_DIG__ == 64
-  // This test is failing on FreeBSD, possibly due to different representations
-  // of the floating point numbers.
+#if defined(__x86_64__) && __LDBL_MANT_DIG__ == 64
   // This test assumes that long doubles are x87 80 bit long doubles.
   const my_facet f(1);
   char str[200];