Revert "expose MAXIMUM_BUFFER_SIZE"

This reverts commit 4e0e1e1.

Author: rmmancom

Lib/io.py

@@ -29,12 +29,8 @@
 DEFAULT_BUFFER_SIZE
 
    An int containing the default buffer size used by the module's buffered
-   I/O classes.
-
-MAXIMUM_BUFFER_SIZE
-
-   An int containing the maximum buffer size used by the module's buffered
-   I/O classes.
+   I/O classes. open() uses the file's blksize (as obtained by os.stat) if
+   possible.
 """
 # New I/O library conforming to PEP 3116.
 
@@ -50,15 +46,13 @@
            "BufferedReader", "BufferedWriter", "BufferedRWPair",
            "BufferedRandom", "TextIOBase", "TextIOWrapper",
            "UnsupportedOperation", "SEEK_SET", "SEEK_CUR", "SEEK_END",
-           "DEFAULT_BUFFER_SIZE", "MAXIMUM_BUFFER_SIZE", "text_encoding",
-           "IncrementalNewlineDecoder"]
+           "DEFAULT_BUFFER_SIZE", "text_encoding", "IncrementalNewlineDecoder"]
 
 
 import _io
 import abc
 
-from _io import (DEFAULT_BUFFER_SIZE, MAXIMUM_BUFFER_SIZE,
-                 BlockingIOError, UnsupportedOperation,
+from _io import (DEFAULT_BUFFER_SIZE, BlockingIOError, UnsupportedOperation,
                  open, open_code, FileIO, BytesIO, StringIO, BufferedReader,
                  BufferedWriter, BufferedRWPair, BufferedRandom,
                  IncrementalNewlineDecoder, text_encoding, TextIOWrapper)

Modules/_io/_iomodule.c

@@ -660,10 +660,6 @@ iomodule_exec(PyObject *m)
     if (PyModule_AddIntMacro(m, DEFAULT_BUFFER_SIZE) < 0)
         return -1;
 
-    /* MAXIMUM_BUFFER_SIZE */
-    if (PyModule_AddIntMacro(m, MAXIMUM_BUFFER_SIZE) < 0)
-        return -1;
-
     /* UnsupportedOperation inherits from ValueError and OSError */
     state->unsupported_operation = PyObject_CallFunction(
         (PyObject *)&PyType_Type, "s(OO){}",