Trac #33792: documentation of save_session refers to the old sagenb

Part of the documentation of `save_session` refers to the old Sage
Notebook sagenb:

{{{
sage: save_session?
[...]
     2. In the Sage notebook the session is saved both to the current
        working cell and to the "DATA" directory.
[...]
}}}

URL: https://trac.sagemath.org/33792
Reported by: slabbe
Ticket author(s): Sébastien Labbé
Reviewer(s): Kwankyu Lee

build/pkgs/configure/checksums.ini

@@ -1,4 +1,4 @@
 tarball=configure-VERSION.tar.gz
-sha1=9e9d35385cef955ca19f96b50c6bd3f5ceeac4fe
-md5=149a9c360571ec4e67dd84ceeae25fbe
-cksum=3945861789
+sha1=ed84cd0d8fc3ae45e13fc3b916476c0830e31b8e
+md5=23f09e0cbe9f2a96a6ae886e39a2107f
+cksum=1142655778

build/pkgs/configure/package-version.txt

@@ -1 +1 @@
-4f9ad1cd06c922af590d1bddd1930546a2aa4073
+81b7241928a4917529c9f9c81f8675f5ebd69fb1

src/sage/misc/session.pyx

@@ -237,10 +237,7 @@ def save_session(name='sage_session', verbose=False):
            saved. This failure is silent unless you set
            ``verbose=True``.
 
-        2. In the Sage notebook the session is saved both to the current
-           working cell and to the ``DATA`` directory.
-
-        3. One can still make sessions that can't be reloaded.  E.g., define
+        2. One can still make sessions that can't be reloaded.  E.g., define
            a class with::
 
                class Foo: pass