[IMP] doc: remove calls to @api.guess and @api.noguess

Those two decorators are removed/deprecated since recent commits but
some references remained in the documentation.

api.guess and api.noguess is deprecated and removed since c552fb7a

closes odoo/odoo#35332

Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>

doc/reference/orm.rst

@@ -1242,10 +1242,3 @@ automatically fill matched parameters from the current
 :attr:`~odoo.api.Environment.user` and
 :attr:`~odoo.api.Environment.context`) or the current recordset (for ``id``
 and ``ids``).
-
-In the rare cases where it is necessary, the bridging can be customized by
-decorating the old-style method:
-
-* disabling it entirely, by decorating a method with
-  :func:`~odoo.api.noguess` there will be no bridging and methods will be
-  called the exact same way from the new and old API styles

odoo/tools/cache.py

 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-# decorator makes wrappers that have the same API as their wrapped function;
-# this is important for the odoo.api.guess() that relies on signatures
+# decorator makes wrappers that have the same API as their wrapped function
 from collections import defaultdict
 from decorator import decorator
 from inspect import formatargspec, getargspec