Remove obsolete ifdef.
diff --git a/Python/ast.c b/Python/ast.c
index b1b697f..5426c02 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -3112,7 +3112,6 @@
     return v;
 }
 
-#ifdef Py_USING_UNICODE
 static PyObject *
 decode_unicode(const char *s, size_t len, int rawmode, const char *encoding)
 {
@@ -3175,7 +3174,6 @@
     Py_XDECREF(u);
     return v;
 }
-#endif
 
 /* s is a Python string literal, including the bracketing quote characters,
  * and r &/or u prefixes (if any), and embedded escape sequences (if any).