Don't include an implementation detail in the doc

Co-authored-by: Petr Viktorin <encukou@gmail.com>

Author: johnslavik

Lib/inspect.py

@@ -2683,7 +2683,7 @@ class Parameter:
         The annotation for the parameter if specified.  If the
         parameter has no annotation, this attribute is set to
         `Parameter.empty`.
-    * kind : int (enum)
+    * kind
         Describes how argument values are bound to the parameter.
         Possible values: `Parameter.POSITIONAL_ONLY`,
         `Parameter.POSITIONAL_OR_KEYWORD`, `Parameter.VAR_POSITIONAL`,