Fix incorrect formatting for HtmlHelper::link().

Remove deprecated parameter. If you use the `:param:` roles, you have to match them up to the number of arguments in the function. Fixes cakephp#2551

Author: markstory

en/core-libraries/helpers/html.rst

@@ -333,7 +333,7 @@ methods of the HtmlHelper and how to use them.
  The ``fullBase`` option was added.
  Support for :term:`plugin syntax` was added.
 
-.. php:method:: link(string $title, mixed $url = null, array $options = array(), string $confirmMessage = false)
+.. php:method:: link(string $title, mixed $url = null, array $options = array())
 
  :param string $title: The text to display as the body of the link.
  :param mixed $url: Either the string location, or a :term:`routing array`.
@@ -471,10 +471,10 @@ methods of the HtmlHelper and how to use them.
  <img src="/img/recipes/6.jpg" alt="Brownies" />
  </a>
 
- .. versionchanged:: 2.4
+  .. versionchanged:: 2.4
  The ``escapeTitle`` option was added.
 
- .. versionchanged:: 2.6
+  .. versionchanged:: 2.6
  The argument ``$confirmMessage`` was deprecated. Use ``confirm`` key
  in ``$options`` instead.