Remove dead anchors

CHANGELOG.rst

@@ -145,7 +145,7 @@ Changes
 - It's now possible to customize the behavior of ``eq`` and ``order`` by passing in a callable.
   `#435 <https://github.com/python-attrs/attrs/issues/435>`_,
   `#627 <https://github.com/python-attrs/attrs/issues/627>`_
-- The instant favorite `next-generation APIs <https://www.attrs.org/en/stable/api.html#next-gen>`_ are not provisional anymore!
+- The instant favorite next-generation APIs are not provisional anymore!
 
   They are also officially supported by Mypy as of their `0.800 release <https://mypy-lang.blogspot.com/2021/01/mypy-0800-released.html>`_.
 

README.rst

@@ -82,7 +82,7 @@ Simply assign ``attrs.field()`` to the attributes instead of annotating them wit
 
 ----
 
-This example uses ``attrs``'s `modern APIs <https://www.attrs.org/en/stable/api.html#next-generation-apis>`_ that have been introduced in version 20.1.0, and the ``attrs`` package import name that has been added in version 21.3.0.
+This example uses ``attrs``'s modern APIs that have been introduced in version 20.1.0, and the ``attrs`` package import name that has been added in version 21.3.0.
 The classic APIs (``@attr.s``, ``attr.ib``, plus their serious business aliases) and the ``attr`` package import name will remain **indefinitely**.
 
 Please check out `On The Core API Names <https://www.attrs.org/en/latest/names.html>`_ for a more in-depth explanation.