Issue #8848: U / U# formats of Py_BuildValue() are just alias to s / s#
diff --git a/Python/modsupport.c b/Python/modsupport.c
index a68e10b..5f5d842 100644
--- a/Python/modsupport.c
+++ b/Python/modsupport.c
@@ -302,39 +302,7 @@
 
         case 's':
         case 'z':
-        {
-            PyObject *v;
-            char *str = va_arg(*p_va, char *);
-            Py_ssize_t n;
-            if (**p_format == '#') {
-                ++*p_format;
-                if (flags & FLAG_SIZE_T)
-                    n = va_arg(*p_va, Py_ssize_t);
-                else
-                    n = va_arg(*p_va, int);
-            }
-            else
-                n = -1;
-            if (str == NULL) {
-                v = Py_None;
-                Py_INCREF(v);
-            }
-            else {
-                if (n < 0) {
-                    size_t m = strlen(str);
-                    if (m > PY_SSIZE_T_MAX) {
-                        PyErr_SetString(PyExc_OverflowError,
-                            "string too long for Python string");
-                        return NULL;
-                    }
-                    n = (Py_ssize_t)m;
-                }
-                v = PyUnicode_FromStringAndSize(str, n);
-            }
-            return v;
-        }
-
-        case 'U':
+        case 'U':   /* XXX deprecated alias */
         {
             PyObject *v;
             char *str = va_arg(*p_va, char *);