Revert "Updated actionpack/CHANGELOG to include enhancements to form option helpers"

No CHANGELOG entries please.

This reverts commit 7fa0a8d7.

actionpack/CHANGELOG

@@ -6,8 +6,6 @@
 
 * Fixed that passing a custom form builder would be forwarded to nested fields_for calls #2023 [Eloy Duran/Nate Wiger]
 
-* Form option helpers now support disabled option tags and the use of lambdas for selecting/disabling option tags from collections #837 [Tekin]
-
 * Added partial scoping to TranslationHelper#translate, so if you call translate(".foo") from the people/index.html.erb template, you'll actually be calling I18n.translate("people.index.foo") [DHH]
 
 * Fix a syntax error in current_page?() that was prevent matches against URL's with multiple query parameters #1385, #1868 [chris finne/Andrew White]