Uncomment Py_DEPRECATED for Py_UNICODE APIs (GH-21318)

PyUnicode_EncodeDecimal and PyUnicode_TransformDecimalToASCII
are deprecated since Python 3.3.
But Py_DEPRECATED(3.3) was commented out.
diff --git a/Include/cpython/unicodeobject.h b/Include/cpython/unicodeobject.h
index 0f19b2a..a82eee4 100644
--- a/Include/cpython/unicodeobject.h
+++ b/Include/cpython/unicodeobject.h
@@ -974,7 +974,7 @@
 
 */
 
-/* Py_DEPRECATED(3.3) */ PyAPI_FUNC(int) PyUnicode_EncodeDecimal(
+Py_DEPRECATED(3.3) PyAPI_FUNC(int) PyUnicode_EncodeDecimal(
     Py_UNICODE *s,              /* Unicode buffer */
     Py_ssize_t length,          /* Number of Py_UNICODE chars to encode */
     char *output,               /* Output buffer; must have size >= length */
@@ -987,7 +987,7 @@
    Returns a new Unicode string on success, NULL on failure.
 */
 
-/* Py_DEPRECATED(3.3) */
+Py_DEPRECATED(3.3)
 PyAPI_FUNC(PyObject*) PyUnicode_TransformDecimalToASCII(
     Py_UNICODE *s,              /* Unicode buffer */
     Py_ssize_t length           /* Number of Py_UNICODE chars to transform */