Remove mention of super old defined_javascript_functions method [ci skip]

carlosantoniodasilva · carlosantoniodasilva · commit 519e70081f2c · 2015-04-11T18:00:20.000-03:00
It was removed long ago: e358b1f.
diff --git a/guides/source/action_view_overview.md b/guides/source/action_view_overview.md
@@ -1420,10 +1420,6 @@ date_field_tag "dob"
 
 Provides functionality for working with JavaScript in your views.
 
-#### define_javascript_functions
-
-Includes the Action Pack JavaScript libraries inside a single `script` tag.
-
 #### escape_javascript
 
 Escape carrier returns and single and double quotes for JavaScript segments.
