doc/org-manual.org (Generating a sitemap): Fix property list

* doc/org-manual.org (Generating a sitemap): Add missing
:sitemap-style property description.  Remove deprecated
:sitemap-file-entry-format and :sitemap-date-format.

Reported-by: Stefan Kangas <stefankangas@gmail.com>
Link: https://orgmode.org/list/CADwFkmnsjEg+d7ty0bjT5RGQiS-SdKcvRUy+KHDh+maa92bp1w@mail.gmail.com

doc/org-manual.org

@@ -16986,6 +16986,12 @@ a map of files for a given project.
 
   Title of sitemap page.  Defaults to name of file.
 
+- ~:sitemap-style~ ::
+
+    Can be ~list~ (site-map is just an itemized list of the titles of
+    the files involved) or ~tree~ (the directory structure of the
+    source files is reflected in the site-map).  Defaults to ~tree~.
+
 - ~:sitemap-format-entry~ ::
 
   #+findex: org-publish-find-date
@@ -17031,21 +17037,6 @@ a map of files for a given project.
 
   Should sorting be case-sensitive?  Default ~nil~.
 
-- ~:sitemap-file-entry-format~ ::
-
-  With this option one can tell how a sitemap's entry is formatted in
-  the sitemap.  This is a format string with some escape sequences:
- ~%t~ stands for the title of the file, ~%a~ stands for the author of
-  the file and ~%d~ stands for the date of the file.  The date is
-  retrieved with the ~org-publish-find-date~ function and formatted
-  with ~org-publish-sitemap-date-format~.  Default ~%t~.
-
-- ~:sitemap-date-format~ ::
-
-  Format string for the ~format-time-string~ function that tells how
-  a sitemap entry's date is to be formatted.  This property bypasses
- ~org-publish-sitemap-date-format~ which defaults to ~%Y-%m-%d~.
-
 *** Generating an index
 :PROPERTIES:
 :DESCRIPTION: An index that reaches across pages.