Main TOC gets depth 3; Example section TOC removed.

Since the doc is split, the top level TOC is shorter and can display
the individual example sections.

This means the example section TOC isn't needed.

Author: rouilj

doc/customizing.txt

@@ -16,7 +16,7 @@ Customising Roundup
    http://www.zope.org/Documentation/Books/ZopeBook/current/ZPT.stx
 
 .. contents::
-   :depth: 2
+   :depth: 3
    :local:
 
 What You Can Do
@@ -46,11 +46,6 @@ includes adding or removing properties from classes.
 Examples
 ========
 
-.. contents::
-   :local:
-   :depth: 2
-
-
 Changing what's stored in the database
 --------------------------------------