Remove duplicate content in `Mapping types - dict` documentation (#141036)

diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 5a2021e31ee4e3460928b1d983744472ff17fcaa..327a7037aee0d4a543db23761988412cbcec77b4 100644 (file)
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -5100,9 +5100,6 @@ can be used interchangeably to index the same dictionary entry.
    being added is already present, the value from the keyword argument
    replaces the value from the positional argument.
 
-   Providing keyword arguments as in the first example only works for keys that
-   are valid Python identifiers.  Otherwise, any valid keys can be used.
-
    Dictionaries compare equal if and only if they have the same ``(key,
    value)`` pairs (regardless of ordering). Order comparisons ('<', '<=', '>=', '>') raise
    :exc:`TypeError`.  To illustrate dictionary creation and equality,