gh-104773: PEP 594: Remove the imghdr module (#104777)

* Remove the Lib/test/imghdrdata/ directory.
* Copy 5 pictures (gif, png, ppm, pgm, xbm) from removed
  Lib/test/imghdrdata/ to a new Lib/test/tkinterdata/ directory.
* Update Sphinx from 4.5 to 6.2 in Doc/requirements.txt.

2 files changed, 0 insertions, 87 deletions

diff --git a/Doc/library/imghdr.rst b/Doc/library/imghdr.rst
deleted file mode 100644
index 630fd70..0000000
--- a/Doc/library/imghdr.rst
+++ /dev/null
@@ -1,86 +0,0 @@
-:mod:`imghdr` --- Determine the type of an image
-================================================
-
-.. module:: imghdr
-   :synopsis: Determine the type of image contained in a file or byte stream.
-   :deprecated:
-
-**Source code:** :source:`Lib/imghdr.py`
-
-.. deprecated-removed:: 3.11 3.13
-   The :mod:`imghdr` module is deprecated
-   (see :pep:`PEP 594 <594#imghdr>` for details and alternatives).
-
---------------
-
-The :mod:`imghdr` module determines the type of image contained in a file or
-byte stream.
-
-The :mod:`imghdr` module defines the following function:
-
-
-.. function:: what(file, h=None)
-
-   Test the image data contained in the file named *file* and return a
-   string describing the image type.  If *h* is provided, the *file*
-   argument is ignored and *h* is assumed to contain the byte stream to test.
-
-   .. versionchanged:: 3.6
-      Accepts a :term:`path-like object`.
-
-The following image types are recognized, as listed below with the return value
-from :func:`what`:
-
-+------------+-----------------------------------+
-| Value      | Image format                      |
-+============+===================================+
-| ``'rgb'``  | SGI ImgLib Files                  |
-+------------+-----------------------------------+
-| ``'gif'``  | GIF 87a and 89a Files             |
-+------------+-----------------------------------+
-| ``'pbm'``  | Portable Bitmap Files             |
-+------------+-----------------------------------+
-| ``'pgm'``  | Portable Graymap Files            |
-+------------+-----------------------------------+
-| ``'ppm'``  | Portable Pixmap Files             |
-+------------+-----------------------------------+
-| ``'tiff'`` | TIFF Files                        |
-+------------+-----------------------------------+
-| ``'rast'`` | Sun Raster Files                  |
-+------------+-----------------------------------+
-| ``'xbm'``  | X Bitmap Files                    |
-+------------+-----------------------------------+
-| ``'jpeg'`` | JPEG data in JFIF or Exif formats |
-+------------+-----------------------------------+
-| ``'bmp'``  | BMP files                         |
-+------------+-----------------------------------+
-| ``'png'``  | Portable Network Graphics         |
-+------------+-----------------------------------+
-| ``'webp'`` | WebP files                        |
-+------------+-----------------------------------+
-| ``'exr'``  | OpenEXR Files                     |
-+------------+-----------------------------------+
-
-.. versionadded:: 3.5
-   The *exr* and *webp* formats were added.
-
-
-You can extend the list of file types :mod:`imghdr` can recognize by appending
-to this variable:
-
-
-.. data:: tests
-
-   A list of functions performing the individual tests.  Each function takes two
-   arguments: the byte-stream and an open file-like object. When :func:`what` is
-   called with a byte-stream, the file-like object will be ``None``.
-
-   The test function should return a string describing the image type if the test
-   succeeded, or ``None`` if it failed.
-
-Example::
-
-   >>> import imghdr
-   >>> imghdr.what('bass.gif')
-   'gif'
-
diff --git a/Doc/library/superseded.rst b/Doc/library/superseded.rst
index 24e7411..bd17039 100644
--- a/Doc/library/superseded.rst
+++ b/Doc/library/superseded.rst
@@ -10,5 +10,4 @@ backwards compatibility. They have been superseded by other modules.
 
 .. toctree::
 
-   imghdr.rst
    optparse.rst