Add C-API documentation for PyUnicode_AsDecodedObject/Unicode and PyUnicode_AsEncodedObject/Unicode

Include/unicodeobject.h

Index: Include/unicodeobject.h
===================================================================
--- Include/unicodeobject.h	(révision 82199)
+++ Include/unicodeobject.h	(copie de travail)
@@ -143,11 +143,7 @@
 
 # define PyUnicode_AsASCIIString PyUnicodeUCS2_AsASCIIString
 # define PyUnicode_AsCharmapString PyUnicodeUCS2_AsCharmapString
-# define PyUnicode_AsDecodedObject PyUnicodeUCS2_AsDecodedObject
-# define PyUnicode_AsDecodedUnicode PyUnicodeUCS2_AsDecodedUnicode
-# define PyUnicode_AsEncodedObject PyUnicodeUCS2_AsEncodedObject
 # define PyUnicode_AsEncodedString PyUnicodeUCS2_AsEncodedString
-# define PyUnicode_AsEncodedUnicode PyUnicodeUCS2_AsEncodedUnicode
 # define PyUnicode_AsLatin1String PyUnicodeUCS2_AsLatin1String
 # define PyUnicode_AsRawUnicodeEscapeString PyUnicodeUCS2_AsRawUnicodeEscapeString
 # define PyUnicode_AsUTF32String PyUnicodeUCS2_AsUTF32String
@@ -178,7 +174,6 @@
 # define PyUnicode_DecodeUTF8 PyUnicodeUCS2_DecodeUTF8
 # define PyUnicode_DecodeUTF8Stateful PyUnicodeUCS2_DecodeUTF8Stateful
 # define PyUnicode_DecodeUnicodeEscape PyUnicodeUCS2_DecodeUnicodeEscape
-# define PyUnicode_Encode PyUnicodeUCS2_Encode
 # define PyUnicode_EncodeASCII PyUnicodeUCS2_EncodeASCII
 # define PyUnicode_EncodeCharmap PyUnicodeUCS2_EncodeCharmap
 # define PyUnicode_EncodeDecimal PyUnicodeUCS2_EncodeDecimal
@@ -243,11 +238,7 @@
 
 # define PyUnicode_AsASCIIString PyUnicodeUCS4_AsASCIIString
 # define PyUnicode_AsCharmapString PyUnicodeUCS4_AsCharmapString
-# define PyUnicode_AsDecodedObject PyUnicodeUCS4_AsDecodedObject
-# define PyUnicode_AsDecodedUnicode PyUnicodeUCS4_AsDecodedUnicode
-# define PyUnicode_AsEncodedObject PyUnicodeUCS4_AsEncodedObject
 # define PyUnicode_AsEncodedString PyUnicodeUCS4_AsEncodedString
-# define PyUnicode_AsEncodedUnicode PyUnicodeUCS4_AsEncodedUnicode
 # define PyUnicode_AsLatin1String PyUnicodeUCS4_AsLatin1String
 # define PyUnicode_AsRawUnicodeEscapeString PyUnicodeUCS4_AsRawUnicodeEscapeString
 # define PyUnicode_AsUTF32String PyUnicodeUCS4_AsUTF32String
@@ -278,7 +269,6 @@
 # define PyUnicode_DecodeUTF8 PyUnicodeUCS4_DecodeUTF8
 # define PyUnicode_DecodeUTF8Stateful PyUnicodeUCS4_DecodeUTF8Stateful
 # define PyUnicode_DecodeUnicodeEscape PyUnicodeUCS4_DecodeUnicodeEscape
-# define PyUnicode_Encode PyUnicodeUCS4_Encode
 # define PyUnicode_EncodeASCII PyUnicodeUCS4_EncodeASCII
 # define PyUnicode_EncodeCharmap PyUnicodeUCS4_EncodeCharmap
 # define PyUnicode_EncodeDecimal PyUnicodeUCS4_EncodeDecimal
@@ -764,43 +754,6 @@
     const char *errors          /* error handling */
     );
 
-/* Decode a Unicode object unicode and return the result as Python
-   object. */
-
-PyAPI_FUNC(PyObject*) PyUnicode_AsDecodedObject(
-    PyObject *unicode,          /* Unicode object */
-    const char *encoding,       /* encoding */
-    const char *errors          /* error handling */
-    );
-
-/* Decode a Unicode object unicode and return the result as Unicode
-   object. */
-
-PyAPI_FUNC(PyObject*) PyUnicode_AsDecodedUnicode(
-    PyObject *unicode,          /* Unicode object */
-    const char *encoding,       /* encoding */
-    const char *errors          /* error handling */
-    );
-
-/* Encodes a Py_UNICODE buffer of the given size and returns a
-   Python string object. */
-
-PyAPI_FUNC(PyObject*) PyUnicode_Encode(
-    const Py_UNICODE *s,        /* Unicode char buffer */
-    Py_ssize_t size,            /* number of Py_UNICODE chars to encode */
-    const char *encoding,       /* encoding */
-    const char *errors          /* error handling */
-    );
-
-/* Encodes a Unicode object and returns the result as Python
-   object. */
-
-PyAPI_FUNC(PyObject*) PyUnicode_AsEncodedObject(
-    PyObject *unicode,          /* Unicode object */
-    const char *encoding,       /* encoding */
-    const char *errors          /* error handling */
-    );
-
 /* Encodes a Unicode object and returns the result as Python string
    object. */
 
@@ -810,15 +763,6 @@
     const char *errors          /* error handling */
     );
 
-/* Encodes a Unicode object and returns the result as Unicode
-   object. */
-
-PyAPI_FUNC(PyObject*) PyUnicode_AsEncodedUnicode(
-    PyObject *unicode,          /* Unicode object */
-    const char *encoding,       /* encoding */
-    const char *errors          /* error handling */
-    );
-
 /* Build an encoding map. */
 
 PyAPI_FUNC(PyObject*) PyUnicode_BuildEncodingMap(