Removing RJS hack

Signed-off-by: José Valim <jose.valim@gmail.com>

actionpack/lib/action_view/base.rb

@@ -188,11 +188,6 @@ module ActionView #:nodoc:
 
     delegate :logger, :to => :controller, :allow_nil => true
 
-    # TODO: HACK FOR RJS
-    def view_context
-      self
-    end
-
     def self.xss_safe? #:nodoc:
       true
     end

actionpack/lib/action_view/helpers/prototype_helper.rb

@@ -579,7 +579,7 @@ module ActionView
       #     page.hide 'spinner'
       #   end
       def update_page(&block)
-        JavaScriptGenerator.new(view_context, &block).to_s.html_safe
+        JavaScriptGenerator.new(self, &block).to_s.html_safe
       end
 
       # Works like update_page but wraps the generated JavaScript in a <script>