Remove redundant information

Author: vstinner

Doc/c-api/dict.rst

@@ -177,8 +177,6 @@ Dictionary objects
    occurred.  Return ``NULL`` **without** an exception set if the key
    wasn't present.
 
-   The first argument can be a :class:`dict` or a :class:`frozendict`.
-
    .. versionchanged:: next
       Accept also :class:`frozendict`.
 
@@ -189,8 +187,6 @@ Dictionary objects
    :c:expr:`const char*` UTF-8 encoded bytes string, rather than a
    :c:expr:`PyObject*`.
 
-   The first argument can be a :class:`dict` or a :class:`frozendict`.
-
    .. note::
 
       Exceptions that occur while this calls :meth:`~object.__hash__` and
@@ -209,8 +205,6 @@ Dictionary objects
    :c:expr:`const char*` UTF-8 encoded bytes string, rather than a
    :c:expr:`PyObject*`.
 
-   The first argument can be a :class:`dict` or a :class:`frozendict`.
-
    .. versionadded:: 3.13
 
    .. versionchanged:: next