Revert "XXX posix with complications, likely drop after testing"

This reverts commit efd75423fcddff5b9972d6efb08968c73107dc2a.

locale.c

@@ -1663,29 +1663,7 @@ S_posix_setlocale_with_complications(pTHX_ const int cat,
     if (new_locale == NULL) {
         new_locale = base_posix_setlocale_(cat, NULL);
         assert(new_locale);
-
-#  ifndef LC_ALL
-
         return new_locale;
-
-#  else
-
-        /* There's no need to reconcile anything if all the possible categories
-         *
-         * XXX I now think the only reason for this is to convert to our internal format; but is this the place to do that.  Prob. not.
-         *
-         * are the same; that means the subset known to us are the same.
-         * XXX warn if ignored not C?
-         * Otherwise. call a function that handles the reconciliation */
-        if (! is_disparate_LC_ALL(new_locale)) {
-            return new_locale;
-        }
-
-        return calculate_LC_ALL_string(NULL, INTERNAL_FORMAT,
-                                       false,  /* Use temporary for result */
-                                       caller_line);
-#  endif
-
     }
 
     const char * locale_on_entry = NULL;