revert changelog changes

Author: blink1073

doc/changelog.rst

@@ -1,20 +1,6 @@
 Changelog
 =========
 
-Changes in Version 4.15.1 (2025/09/16)
---------------------------------------
-
-Version 4.15.1 is a bug fix release.
-
-- Fixed a bug in :meth:`~pymongo.synchronous.encryption.ClientEncryption.encrypt`
-  and :meth:`~pymongo.asynchronous.encryption.AsyncClientEncryption.encrypt`
-  that would cause a ``TypeError`` when using ``pymongocrypt<1.16`` by passing
-  an unsupported ``type_opts`` parameter even if Queryable Encryption text
-  queries beta was not used.
-
-- Fixed a bug in ``AsyncMongoClient`` that caused a ``ServerSelectionTimeoutError``
-  when used with ``uvicorn``, ``FastAPI``, or ``uvloop``.
-
 Changes in Version 4.15.0 (2025/09/10)
 --------------------------------------