Refs #20935 -- Removed inappropriate crosslink to docs search results page.

The link to the search page does not work in the Epub, since there is no such thing. In the online docs, the link to the search page displays a “No search query given” error, since its purpose is to display results from the search bar. Alone, without a query, it's just empty.

docs/intro/whatsnext.txt

@@ -24,8 +24,8 @@ Finding documentation
 =====================
 
 Django's got a *lot* of documentation -- almost 450,000 words and counting --
-so finding what you need can sometimes be tricky. A few good places to start
-are the :ref:`search` and the :ref:`genindex`.
+so finding what you need can sometimes be tricky. A good place to start
+is the :ref:`genindex`. We also recommend using the builtin search feature.
 
 Or you can just browse around!