[3.15] gh-153630: Add str.remove{prefix,suffix}() to the str method summary (GH-153629) (#153778)

(cherry picked from commit b4662e8)

Co-authored-by: darida12321 <73121369+darida12321@users.noreply.github.com>
Co-authored-by: Stan Ulbrych <stan@python.org>

Author: 3 people

Doc/library/stdtypes.rst

@@ -1720,7 +1720,11 @@ category.
 |                          |  :meth:`str.strip`                        |  :meth:`bytes.strip`                              |
 |                          +--------------------+----------------------+----------------------+----------------------------+
 |                          | :meth:`str.lstrip` | :meth:`str.rstrip`   | :meth:`bytes.lstrip` | :meth:`bytes.rstrip`       |
-+--------------------------+--------------------+----------------------+----------------------+----------------------------+
+|                          +--------------------+----------------------+----------------------+----------------------------+
+|                          |  :meth:`str.removeprefix`                 |  :meth:`bytes.removeprefix`                       |
+|                          +-------------------------------------------+---------------------------------------------------+
+|                          |  :meth:`str.removesuffix`                 |  :meth:`bytes.removesuffix`                       |
++--------------------------+-------------------------------------------+---------------------------------------------------+
 | Translation and Encoding |  :meth:`str.translate`                    |  :meth:`bytes.translate`                          |
 |                          +-------------------------------------------+---------------------------------------------------+
 |                          |  :meth:`str.maketrans`                    |  :meth:`bytes.maketrans`                          |